User:Klw214

Question 1 	0 out of 1 points   
	If a plant cell is placed in deionized water the water potential of that cell becomes 			

Selected Answer: E. More negative because the osmotic potential becomes more positive

  Question 2 	1 out of 1 points   
	Acid precipitation could affect plants adversely by 			

Selected Answer: D. a and b

  Question 3 	0 out of 1 points   
	Cells of many large algae called kelps contain an iodine ion concentration up to 20,000 times the iodine ion concentration in seawater. The iodine ions move into these cells by 			

Selected Answer: B. Osmosis through a completely impermeable membrane

  Question 4 	0 out of 1 points   
	If the top of a woody stem is removed 			

Selected Answer: E. a, b and c

  Question 5 	0 out of 1 points   
	Flowers of night-blooming cereus are open at night and closed during the day. This is an example of a 			

Selected Answer: C. Photomorphogenic response

  Question 6 	0 out of 1 points   
	The structure in mosses that produces an egg releases a chemical as it matures that attracts the flagellated sperm produced in a different structure. This is an example of 			

Selected Answer: D. Negative thigmotropism

  Question 7 	0 out of 1 points   
	If the site of perception of an environmental stimulus is a leaf, then the site of transduction is a 			

Selected Answer: B. Stem

  Question 8 	0 out of 1 points   
	Just after the sun rises, the initial event that leads to the opening of stomatal pores is 			

Selected Answer: A. The diffusion of K+ into guard cells from adjacent cells, lowering the water potential

  Question 9 	1 out of 1 points   
	The interior of root nodules containing nitrogen-fixing bacteria is often pink due to leghemoglobin, which is similar to human hemoglobin. The function of leghemoglobin would most likely be to 			

Selected Answer: B. Tie up O2, reducing its concentration in the nodules

  Question 10 	0 out of 1 points   
	Which of the following does not perform a function of soil when plants are grown hydroponically? 			

Selected Answer: E. Plant supports

  Question 11 	0 out of 1 points   
	The conversion of N2 into ammonia is called 			

Selected Answer: B. Denitrification

  Question 12 	0 out of 1 points   
	According to the pressure flow hypothesis 			

Selected Answer: D. Water potential is more positive in sieve elements than in adjacent companion and parenchyma cells

  Question 13 	0 out of 1 points   
	In response to the presence of an insect, the leaf of a Venus' flytrap will close, trapping the insect. The closure is due to 			

Selected Answer: B. The activation of a potassium pump, which pumps potassium out of motor cells, resulting in water diffusion out of the cells

  Question 14 	1 out of 1 points   
	If a plant is to grow and reproduce, it must be supplied with a large quantity of 			

Selected Answer: B. Phosphorus

  Question 15 	1 out of 1 points   
	Essential elements would not be made available to plants by 			

Selected Answer: D. All of the above make essential elements available

  Question 16 	0 out of 1 points   
	If you want to produce a bushier shrub with more branches, you should 			

Selected Answer: C. Pinch off the root tips

  Question 17 	0 out of 1 points   
	Which is a true statement regarding element essentiality? 			

Selected Answer: D. Plants grow much better in a nutrient solution containing EDTA, a compound that keeps iron in solution, therefore EDTA is essential for plant growth

  Question 18 	1 out of 1 points   
	Many farmers apply nitrogen in fertilizer in the form of ammonia. The form of nitrogen then taken up from the soil most often by plants is 			

Selected Answer: E. Nitrate

  Question 19 	1 out of 1 points   
	Plants differ from animals because plants 			

Selected Answer: E. Make all the organic molecules they need; animals cannot

  Question 20 	0 out of 1 points   
	The principal pigment involved in photoperiodism and endogenous rhythms is 			

Selected Answer: B. Phototropin

  Question 21 	0 out of 1 points   
	Maple trees are unlikely to initiate an adaptive response to 			

Selected Answer: A. Air temperature in autumn

  Question 22 	1 out of 1 points   
	Which of the following would be most likely to develop deficiency symptoms? 			

Selected Answer: B. A crop plant growing in a field that has been cultivated for many years

  Question 23 	1 out of 1 points   
	To differentiate into the correct type of mature plant cell, an unspecialized cell in a meristem might be influenced by 			

Selected Answer: E. a, b, and c

  Question 24 	0 out of 1 points   
	Many plants flower in response to a change in day length. Plants with this adaptation probably have evolved in all of the following areas except 			

Selected Answer: B. Antarctica

  Question 25 	0 out of 1 points   
	The first plant hormone discovered was 			

Selected Answer: A. Cytokinin

Question 1 1 out of 1 points

	Which of the following would be most likely to develop deficiency symptoms? 			

Selected Answer: E. A crop plant growing in a field that has been cultivated for many years

  Question 2 	0 out of 1 points   
	Which of the following does not perform a function of soil when plants are grown hydroponically? 			

Selected Answer: A. The container holding the nutrient solution

  Question 3 	1 out of 1 points   
	From an energy-conservation standpoint, the most favorable form of nitrogen for a plant is 			

Selected Answer: E. NH4+

  Question 4 	0 out of 1 points   
	We are not confident that all plants require 			

Selected Answer: D. Nitrogen

  Question 5 	0 out of 1 points   
	If a plant produced a lower than normal supply of auxin 			

Selected Answer: B. Would not have as much xylem differentiation

  Question 6 	0 out of 1 points   
	Many plants flower in response to a change in day length. Plants with this adaptation probably have evolved in all of the following areas except 			

Selected Answer: D. The United States

  Question 7 	0 out of 1 points   
	Which of the following conditions promotes xylem transport of water? 			

Selected Answer: D. Environmental conditions do not affect xylem transport

  Question 8 	0 out of 1 points   
	If seedlings of forest trees are grown in nutrient solution then transplanted to fertile prairie soils, the trees grow very poorly. This is most probably due to 			

Selected Answer: A. An over abundance of phosphorus in the soil

  Question 9 	0 out of 1 points   
	Drought-tolerating plants are not likely to 			

Selected Answer: A. Have succulent stems and no foliage leaves

  Question 10 	0 out of 1 points   
	If plants are grown in a soil deficient in molybdenum, nitrogen must be supplied in what form for the plants to survive? 			

Selected Answer: C. NO2

  Question 11 	1 out of 1 points   
	Cells of many large algae called kelps contain an iodine ion concentration up to 20,000 times the iodine ion concentration in seawater. The iodine ions move into these cells by 			

Selected Answer: B. Active transport using molecular pumps

  Question 12 	0 out of 1 points   
	Two cells are adjacent to one another. If Cell A has a water potential = -0.5 MPa and Cell B has a water potential = -1.0 MPa, then water molecules will 			

Selected Answer: D. Move from B to A at a greater rate than from A to B

  Question 13 	1 out of 1 points   
	Water moves from the soil into the xylem of a root via 			

Selected Answer: B. Diffusion and osmosis

  Question 14 	0 out of 1 points   
	Julius von Sachs established a nutrient solution containing calcium nitrate, potassium nitrate, potassium phosphate, and magnesium sulfate that would support plant growth. Because plants can grow in this solution, it can be concluded that 			

Selected Answer: C. Calcium, nitrogen, potassium, phosphorus, magnesium, and sulfur are all essential elements

  Question 15 	0 out of 1 points   
	If a plant cell whose water potential is – 1.0 MPa is placed in a salt solution 			

Selected Answer: A. Water diffuses out of the cell

  Question 16 	1 out of 1 points   
	If seeds of a biennial plant, such as beet, are planted in Hawaii, the plants will 			

Selected Answer: B. Grow vegetatively, but will not flower at all due to high temperatures

  Question 17 	0 out of 1 points   
	You could induce vernalization in a beet plant by exposing which plant part to cold temperatures? 			

Selected Answer: C. Leaf petioles

  Question 18 	0 out of 1 points   
	The plants in the accompanying diagram are biennial plants; the blocked in portion was exposed to cold, freezing temperatures. Which of those plants will be vernalized? 			

Selected Answer: C. 1, 2, 3 and 4

  Question 19 	1 out of 1 points   
	The structure in mosses that produces an egg releases a chemical as it matures that attracts the flagellated sperm produced in a different structure. This is an example of 			

Selected Answer: B. Positive chemotaxis

  Question 20 	0 out of 1 points   
	Flowers of night-blooming cereus are open at night and closed during the day. This is an example of a 			

Selected Answer: C. Photomorphogenic response

  Question 21 	0 out of 1 points   
	If you want to produce a bushier shrub with more branches, you should 			

Selected Answer: A. Spray the plant with cytokinin

  Question 22 	0 out of 1 points   
	Successive harvests of crops from a field are likely to deplete the soil of 			

Selected Answer: C. Potassium

  Question 23 	0 out of 1 points   
	Water must reach leaves of the tallest trees, such as eucalyptus. Water moves upward in one of those trees due to 			

Selected Answer: A. We don't know how water moves through the xylem

  Question 24 	0 out of 1 points   
	Plants differ from animals because plants 			

Selected Answer: B. Require a supply of vitamins from the environment; animals do not

  Question 25 	0 out of 1 points   
	Vascular tissues enable a plant to do all of the following except 			

Selected Answer: C. Increase the chance of cross-pollination

 Question 1 	0 out of 1 points   
	If a cell has a water potential of -0.3 MPa, water will diffuse from that cell toward a cell whose water potential is 			

Selected Answer: A. 0 MPa

  Question 2 	0 out of 1 points   
	To complete its life cycle, a grass plant requires 1 gram (gm) phosphorus, 3 gm calcium, 7 gm nitrogen, 0.25 gm iron, and 0.01 gm zinc. If the soil in a field has available 30 gm phosphorus, 600 gm calcium, 200 gm nitrogen, 5 gm iron and 1 gm zinc, then the supply of which element would most likely limit the growth of the grass population? 			

Selected Answer: B. Phosphorus

  Question 3 	0 out of 1 points   
	If cubic meters of different soils are compared, in which is the total surface area of all particles greatest? 			

Selected Answer: B. Coarse sand

  Question 4 	0 out of 1 points   
	A basic difference between most algae and an oak tree is that 			

Selected Answer: D. The oak tree is photosynthetic, the algae are not

  Question 5 	0 out of 1 points   
	Stomatal guard cells are most likely to close if 			

Selected Answer: D. The air around the leaf is humid

  Question 6 	0 out of 1 points   
	The first plant hormone discovered was 			

Selected Answer: E. Gibberellin

  Question 7 	0 out of 1 points   
	If a plant cell whose water potential is – 1.0 MPa is placed in a salt solution 			

Selected Answer: C. Water diffuses out of the cell

  Question 8 	1 out of 1 points   
	If plants are grown in a soil deficient in molybdenum, nitrogen must be supplied in what form for the plants to survive? 			

Selected Answer: E. NH4

  Question 9 	1 out of 1 points   
	The principal pigment involved in photoperiodism and endogenous rhythms is 			

Selected Answer: B. Phytochrome

  Question 10 	0 out of 1 points   
	At most plant nurseries, you can buy rooting powder that stimulates root development on stem cuttings. The rooting powder most likely contains 			

Selected Answer: E. Synthetic cytokinins

  Question 11 	0 out of 1 points   
	Plant auxins 			

Selected Answer: D. Are carried specifically to stem cells, which respond

  Question 12 	1 out of 1 points   
	Which of the following is an incorrect match between hormone and function? 			

Selected Answer: D. Abscisic acid - releases buds from dormancy

  Question 13 	0 out of 1 points   
	Water potential of a solution will become more positive by 			

Selected Answer: D. Reducing the pressure on it

  Question 14 	0 out of 1 points   
	The plants in the accompanying diagram are biennial plants; the blocked in portion was exposed to cold, freezing temperatures. Which of those plants will be vernalized? 			

Selected Answer: C. 3 and 4

  Question 15 	1 out of 1 points   
	The structure in mosses that produces an egg releases a chemical as it matures that attracts the flagellated sperm produced in a different structure. This is an example of 			

Selected Answer: C. Positive chemotaxis

  Question 16 	1 out of 1 points   
	Drought-tolerating plants are not likely to 			

Selected Answer: C. Complete their life cycle in one month

  Question 17 	0 out of 1 points   
	Which of the following does not perform a function of soil when plants are grown hydroponically? 			

Selected Answer: D. The container holding the nutrient solution

  Question 18 	0 out of 1 points   
	The position of bean plant leaves is different at noon and at midnight.This change in position is probably influenced by changing 			

Selected Answer: B. Water availability

  Question 19 	0 out of 1 points   
	Which of the following conditions promotes xylem transport of water? 			

Selected Answer: E. Dry, warm nights

  Question 20 	0 out of 1 points   
	The interior of root nodules containing nitrogen-fixing bacteria is often pink due to leghemoglobin, which is similar to human hemoglobin. The function of leghemoglobin would most likely be to 			

Selected Answer: B. Help the nitrogen-fixing bacteria use the ammonia produced in nitrogen fixation

  Question 21 	0 out of 1 points   
	When stomatal pores open at sunrise 			

Selected Answer: C. The pressure potential inside the guard cells becomes more positive

  Question 22 	1 out of 1 points   
	Plant growth is least influenced by 			

Selected Answer: C. Position of the moon

  Question 23 	0 out of 1 points   
	The apical meristem of an actively growing woody stem is removed. If a mixture of paste and gibberellin is applied to the stem tip, cells produced by the vascular cambium will differentiate into 			

Selected Answer: C. Fibers

  Question 24 	0 out of 1 points   
	Vascular tissues enable a plant to do all of the following except 			

Selected Answer: B. Increase the chance of cross-pollination

  Question 25 	1 out of 1 points   
	Dinitrophenol (DNP) prevents oxidative phosphorylation in cells. If roots are exposed to DNP 			

Selected Answer: D. Minerals cannot be taken into the roots

  Question 1 	0 out of 1 points   
	A piece of mica is inserted in the tip of a grass coleoptile and the seedling is exposed to unilateral light as shown in the accompanying diagram. In response, the coleoptile 			

Selected Answer: D. Bends toward the light because of destruction of auxin on the lighted side

  Question 2 	0 out of 1 points   
	Julius von Sachs established a nutrient solution containing calcium nitrate, potassium nitrate, potassium phosphate, and magnesium sulfate that would support plant growth. Because plants can grow in this solution, it can be concluded that 			

Selected Answer: E. Phosphorus is required by plants but sulfur is not

  Question 3 	0 out of 1 points   
	If an animal brushes by a plant and tears off a leaf, what prevents the plant from losing sugar from the open wound on the stem? 			

Selected Answer: A. P-protein surges toward the sieve plates forming a P-protein plug

  Question 4 	0 out of 1 points   
	Plant auxins 			

Selected Answer: A. Move fairly rapidly through the phloem

  Question 5 	1 out of 1 points   
	Water moves from the soil into the xylem of a root via 			

Selected Answer: C. Diffusion and osmosis

  Question 6 	0 out of 1 points   
	In response to the presence of an insect, the leaf of a Venus' flytrap will close, trapping the insect. The closure is due to 			

Selected Answer: B. The activation of a potassium pump, which pumps potassium into motor cells, resulting in water diffusion out of the cells

  Question 7 	1 out of 1 points   
	The interior of root nodules containing nitrogen-fixing bacteria is often pink due to leghemoglobin, which is similar to human hemoglobin. The function of leghemoglobin would most likely be to 			

Selected Answer: A. Tie up O2, reducing its concentration in the nodules

  Question 8 	0 out of 1 points   
	Drought-tolerating plants are not likely to 			

Selected Answer: B. Produce wood with a high percentage of parenchyma cells

  Question 9 	0 out of 1 points   
	If a bulb is planted, its orientation does not matter because the 			

Selected Answer: B. Shoot grows upward due to negative gravitropism

  Question 10 	0 out of 1 points   
	If a flower opens at night and closes during the day, the response is 			

Selected Answer: D. Photomorphogenic

  Question 11 	1 out of 1 points   
	Which of the following is an incorrect match between hormone and function? 			

Selected Answer: E. Abscisic acid - releases buds from dormancy

  Question 12 	0 out of 1 points   
	The only plant hormone that is a gas is 			

Selected Answer: C. Gibberellin

  Question 13 	1 out of 1 points   
	Many fruits are harvested before they are ripe because it is easier to transport them in that stage of development. They must be transported in a partial vacuum mainly to 			

Selected Answer: C. Draw out ethylene that will hasten ripening

  Question 14 	1 out of 1 points   
	In temperate regions, the main way plants detect seasons of the year is through 			

Selected Answer: C. Day length

  Question 15 	1 out of 1 points   
	Plants differ from animals because plants 			

Selected Answer: D. Make all the organic molecules they need; animals cannot

  Question 16 	0 out of 1 points   
	If populations of free-living bacteria in the soil make nitrogen from the air available to organisms and that nitrogen is eventually absorbed and incorporated into plants, what is the most likely sequence of events in the soil and then in the plants? 			

Selected Answer: D. Nitrogen fixation →ammonia oxidation →nitrite reduction →nitrate reduction

  Question 17 	1 out of 1 points   
	Which of the following conditions promotes xylem transport of water? 			

Selected Answer: A. Dry, warm days

  Question 18 	1 out of 1 points   
	To move sucrose molecules from leaves to roots, the sucrose molecules must enter sieve elements. This involves 			

Selected Answer: D. The use of ATP to pump sucrose molecules against their concentration gradient across the plasma membrane

  Question 19 	0 out of 1 points   
	If cubic meters of different soils are compared, in which is the total surface area of all particles greatest? 			

Selected Answer: A. All would have the same total surface area

  Question 20 	0 out of 1 points   
	Just after the sun rises, the initial event that leads to the opening of stomatal pores is 			

Selected Answer: C. The diffusion of K+ into guard cells from adjacent cells, lowering the water potential

  Question 21 	0 out of 1 points   
	Long distance transport systems are adaptive in land plants because 			

Selected Answer: B. They compete for sunlight, leading to taller plants

  Question 22 	1 out of 1 points   
	The principal pigment involved in photoperiodism and endogenous rhythms is 			

Selected Answer: A. Phytochrome

  Question 23 	0 out of 1 points   
	Under experimental conditions, how could you cause stomatal openings in a plant? 			

Selected Answer: B. Lower the amount of CO2 around the plant

  Question 24 	1 out of 1 points   
	If seeds of a biennial plant, such as beet, are planted in Hawaii, the plants will 			

Selected Answer: D. Grow vegetatively, but will not flower at all due to high temperatures

  Question 25 	0 out of 1 points   
	When a plant cell is placed in deionized (pure) water 			

Selected Answer: B. Water diffuses into the cell because the water potential of the cell is less negative than the water potential of the deionized water

  Question 1 1 out of 1 points  

Plants growing in sterile soil would most likely exhibit leaves that

Selected Answer:  B.  Are a purple color

  Question 2 

1 out of 1 points  

Which of the following conditions promotes xylem transport of water?

Selected Answer:  C.  Dry, warm days

  Question 3 

0 out of 1 points  

If all of the fruits (seeds) on the outside of a strawberry are removed when it is young, it will not develop. If the strawberry is sprayed with a hormone solution, normal development occurs. The hormone most likely to cause a response is

Selected Answer:  B.  Cytokinin

  Question 4 

0 out of 1 points  

Plant auxins

Selected Answer:  C.  Act only in moderately high concentrations

  Question 5 

0 out of 1 points  

If a plant is placed in a horizontal position the

Selected Answer:  B.  a and c

  Question 6 

1 out of 1 points  

Long distance transport systems are adaptive in land plants because

Selected Answer:  D.  a and b

  Question 7 

1 out of 1 points  

As water flows from streams to rivers to oceans

Selected Answer:  D.  a and b

  Question 8 

0 out of 1 points  

Many farmers apply nitrogen in fertilizer in the form of ammonia. The form of nitrogen then taken up from the soil most often by plants is

Selected Answer:  D.  Ammonia

  Question 9 

1 out of 1 points  

The structure in mosses that produces an egg releases a chemical as it matures that attracts the flagellated sperm produced in a different structure. This is an example of

Selected Answer:  D.  Positive chemotaxis

  Question 10 

0 out of 1 points  

If seeds of a biennial plant, such as beet, are planted in Hawaii, the plants will

Selected Answer:  E.  Grow vegetatively, but will not flower at all due to incorrect day length

  Question 11 

1 out of 1 points  

In response to the presence of an insect, the leaf of a Venus' flytrap will close, trapping the insect. The closure is due to

Selected Answer:  B.  A rapid change in permeability of motor cell plasma membranes to potassium, causing potassium and then water to diffuse out of the cells

  Question 12 

1 out of 1 points  

Plants differ from animals because plants

Selected Answer:  C.  Make all the organic molecules they need; animals cannot

  Question 13 

1 out of 1 points  

Which is a true statement regarding element essentiality?

Selected Answer:  C.  The function of boron is unknown, but growth will not occur without it, therefore it is essential

  Question 14 

1 out of 1 points  

If a plant is deficient in phosphorus, a typical deficiency symptom would be

Selected Answer:  C.  Older leaves that are purple

  Question 15 

1 out of 1 points  

A plant cell and an animal cell, both with a water potential of –1.5 MPa, are placed in a beaker of deionized water. What happens in this system?

Selected Answer:  D.  Water diffuses into both cells; the animal cells bursts and the plant cell does not

  Question 16 

1 out of 1 points  

We are not confident that all plants require

Selected Answer:  A.  Boron

  Question 17 

0 out of 1 points  

The lipid component of a lipid/protein membrane is important to

Selected Answer:  B.  b and d

  Question 18 

1 out of 1 points  

When a plant cell is placed in deionized (pure) water

Selected Answer:  B.  Water diffuses into the cell because the water potential of the cell is more negative than the water potential of the deionized water

  Question 19 

1 out of 1 points  

To complete its life cycle, a grass plant requires 1 gram (gm) phosphorus, 3 gm calcium, 7 gm nitrogen, 0.25 gm iron, and 0.01 gm zinc. If the soil in a field has available 30 gm phosphorus, 600 gm calcium, 200 gm nitrogen, 5 gm iron and 1 gm zinc, then the supply of which element would most likely limit the growth of the grass population?

Selected Answer:  A.  Iron

  Question 20 

0 out of 1 points  

Cells of many large algae called kelps contain an iodine ion concentration up to 20,000 times the iodine ion concentration in seawater. The iodine ions move into these cells by

Selected Answer:  C.  Active transport directly through a membrane's lipid bilayer

  Question 21 

1 out of 1 points  

If an animal brushes by a plant and tears off a leaf, what prevents the plant from losing sugar from the open wound on the stem?

Selected Answer:  A.  c and d

  Question 22 

1 out of 1 points  

Just after the sun rises, the initial event that leads to the opening of stomatal pores is

Selected Answer:  A.  The active transport of K+ into guard cells from adjacent cells, lowering the water potential

  Question 23 

0 out of 1 points  

If you know in advance that a field will be temporarily flooded, an application of what hormone might help the plants survive?

Selected Answer:  A.  Ethylene

  Question 24 

1 out of 1 points  

If plants are grown in a soil deficient in molybdenum, nitrogen must be supplied in what form for the plants to survive?

Selected Answer:  E.  NH4

  Question 25 

0 out of 1 points  

If a plant cell is placed in deionized water the water potential of that cell becomes

Selected Answer:  E.  More positive because the osmotic potential becomes more negative

Question 1 0 out of 1 points Which of the plants will flower if the blocked area is exposed to short-days?

Selected Answer: B. 2 only

  Question 2	0 out of 1 points  

If plants are kept in the dark, they have elongated internodes, making them spindly. This effect is due to

Selected Answer: C. An overproduction of gibberellins

  Question 3	0 out of 1 points  

The cells which give a root control over what ends up in the transpiration stream include

Selected Answer: E. Epidermis, cortex and pericycle

  Question 4	1 out of 1 points  

Ethylene stimulates

Selected Answer: E. b and c

  Question 5	1 out of 1 points  

Which of the following is an incorrect match of essential element and function?

Selected Answer: D. Manganese - structural component of chlorophyll

  Question 6	1 out of 1 points  

Crop plants are more likely to develop mineral deficiency symptoms than native plants because

Selected Answer: A. Of their rapid rate of growth

  Question 7	1 out of 1 points  

The only plant hormone that is a gas is

Selected Answer: A. Ethylene

  Question 8	0 out of 1 points  

If the apical meristem of a woody stem is removed, all of the following would stop except

Selected Answer: B. Elongation of young internode cells

  Question 9	1 out of 1 points  

If a plant cell whose water potential is – 1.0 MPa is placed in a salt solution

Selected Answer: D. We do not have enough information to predict what will happen

  Question 10	1 out of 1 points  

Gardeners often add peat moss to soil so that water is retained within the soil and does not drain away as rapidly. A gardener would be most likely to add peat moss to soil that is

Selected Answer: D. Coarse sand

  Question 11	1 out of 1 points  

If an animal brushes by a plant and tears off a leaf, what prevents the plant from losing sugar from the open wound on the stem?

Selected Answer: B. c and d

  Question 12	0 out of 1 points  

The apical meristem of an actively growing woody stem is removed. If a mixture of paste and gibberellin is applied to the stem tip, cells produced by the vascular cambium will differentiate into

Selected Answer: B. The cells will stay meristematic

  Question 13	1 out of 1 points  

The lipid component of a lipid/protein membrane is important to

Selected Answer: E. Prevent hydrophilic ions and molecules from leaking out of a cell

  Question 14	1 out of 1 points  

A molecule that moves out of a cell is least likely to

Selected Answer: D. Enter the cell that it moved out of

  Question 15	0 out of 1 points  

In a tropical rainforest, where there is abundant vegetation and rainfall, the soil contains

Selected Answer: E. Abundant cations due to soil acidity, but few anions due to leaching

  Question 16	1 out of 1 points  

Maple trees are unlikely to initiate an adaptive response to

Selected Answer: E. The leaching of phosphate from the soil

  Question 17	1 out of 1 points  

Flowers of night-blooming cereus are open at night and closed during the day. This is an example of a

Selected Answer: C. Photonastic response

  Question 18	0 out of 1 points  

A basic difference between most algae and an oak tree is that

Selected Answer: A. The algae are capable of translocation, the oak tree is not

  Question 19	1 out of 1 points  

Two cells are adjacent to one another. If Cell A has a water potential = -0.5 MPa and Cell B has a water potential = -1.0 MPa, then water molecules will

Selected Answer: D. Move from A to B at a greater rate than from B to A

  Question 20	1 out of 1 points  

Just after the sun rises, the initial event that leads to the opening of stomatal pores is

Selected Answer: C. The active transport of K+ into guard cells from adjacent cells, lowering the water potential

  Question 21	1 out of 1 points  

If a plant is to grow and reproduce, it must be supplied with a large quantity of

Selected Answer: D. Phosphorus

  Question 22	1 out of 1 points  

If you grow plants whose leaves start to turn yellow and become chlorotic, your plants may need to have which element added to the soil?

Selected Answer: B. Magnesium

  Question 23	1 out of 1 points  

If a cell has a water potential of -0.3 MPa, water will diffuse from that cell toward a cell whose water potential is

Selected Answer: B. -0.4 MPa

  Question 24	0 out of 1 points  

Dinitrophenol (DNP) prevents oxidative phosphorylation in cells. If roots are exposed to DNP

Selected Answer: A. Oxygen molecules cannot get into the roots

  Question 25	1 out of 1 points  

Long distance transport systems are adaptive in land plants because

Selected Answer: D. a and b

  Question 1  0 out of 1 points    
If the phloem sap of a plant was analyzed on a very hot, dry summer day, it would probably contain a higher than normal concentration of  
Selected Answer:  E.  Sugars  

  Question 2  1 out of 1 points    
A molecule that moves out of a cell is least likely to  
Selected Answer:  E.  Enter the cell that it moved out of  

  Question 3  0 out of 1 points    
The position of bean plant leaves is different at noon and at midnight.This change in position is probably influenced by changing  
Selected Answer:  A.  Temperature  

  Question 4  0 out of 1 points    
Dinitrophenol (DNP) prevents oxidative phosphorylation in cells. If roots are exposed to DNP  
Selected Answer:  E.  Water translocation stops  

  Question 5  1 out of 1 points    
Organisms capable of nitrogen fixation include  
Selected Answer:  A.  Bacteria and cyanobacteria  

  Question 6  0 out of 1 points    
Vascular tissues enable a plant to do all of the following except  
Selected Answer:  E.  Increase the chance of cross-pollination  

  Question 7  1 out of 1 points    
If a bulb is planted, its orientation does not matter because the  
Selected Answer:  D.  a and b  

  Question 8  1 out of 1 points    
The source of energy driving the transport of water through the xylem is  
Selected Answer:  C.  The sun  

  Question 9  1 out of 1 points    
Maple trees are unlikely to initiate an adaptive response to  
Selected Answer:  E.  The leaching of phosphate from the soil  

  Question 10  1 out of 1 points    
Many fruits are harvested before they are ripe because it is easier to transport them in that stage of development. They must be transported in a partial vacuum mainly to  
Selected Answer:  A.  Draw out ethylene that will hasten ripening  

  Question 11  1 out of 1 points    
Plant growth is least influenced by  
Selected Answer:  A.  Position of the moon  

  Question 12  1 out of 1 points    
To move sucrose molecules from leaves to roots, the sucrose molecules must enter sieve elements. This involves  
Selected Answer:  E.  The use of ATP to pump sucrose molecules against their concentration gradient across the plasma membrane  

  Question 13  1 out of 1 points    
Many plants flower in response to a change in day length. Plants with this adaptation probably have evolved in all of the following areas except  
Selected Answer:  E.  Equatorial Africa  

  Question 14  1 out of 1 points    
If a flower opens at night and closes during the day, the response is  
Selected Answer:  A.  Photonastic  

  Question 15  0 out of 1 points    
Nitrogen is mainly transported to developing plant parts in which chemical form?  
Selected Answer:  B.  Ammonia  

  Question 16  1 out of 1 points    
If you want to produce a bushier shrub with more branches, you should  
Selected Answer:  A.  Pinch off the stem tips  

  Question 17  1 out of 1 points    
If a plant is to grow and reproduce, it must be supplied with a large quantity of  
Selected Answer:  E.  Phosphorus  

  Question 18  1 out of 1 points    
If a plant is deficient in phosphorus, a typical deficiency symptom would be  
Selected Answer:  E.  Older leaves that are purple  

  Question 19  1 out of 1 points    
If cubic meters of different soils are compared, in which is the total surface area of all particles greatest?  
Selected Answer:  E.  Clay  

  Question 20  1 out of 1 points    
The interior of root nodules containing nitrogen-fixing bacteria is often pink due to leghemoglobin, which is similar to human hemoglobin. The function of leghemoglobin would most likely be to  
Selected Answer:  A.  Tie up O2, reducing its concentration in the nodules  

  Question 21  1 out of 1 points    
If populations of free-living bacteria in the soil make nitrogen from the air available to organisms and that nitrogen is eventually absorbed and incorporated into plants, what is the most likely sequence of events in the soil and then in the plants?  
Selected Answer:  E.  Nitrogen fixation →ammonia oxidation →nitrate reduction →nitrite reduction  

  Question 22  1 out of 1 points    
Plant auxins  
Selected Answer:  A.  Bind to receptor molecules to elicit a response  

  Question 23  1 out of 1 points    
Which of the following is an incorrect match of essential element and function?  
Selected Answer:  C.  Manganese - structural component of chlorophyll  

  Question 24  1 out of 1 points    
Which of the following would be most likely to develop deficiency symptoms?  
Selected Answer:  C.  A crop plant growing in a field that has been cultivated for many years  

  Question 25  0 out of 1 points    
Carbon dioxide molecules diffuse from the atmosphere into plant cells. This movement is due to  
Selected Answer:  C.  Wind currents  

  Question 1 

0 out of 1 points  

Which of the plants will flower if the blocked area is exposed to short-days?

Selected Answer:  D.  2,3, short-day branch of 4

  Question 2 

1 out of 1 points  

Water moves from the soil into the xylem of a root via

Selected Answer:  D.  Diffusion and osmosis

  Question 3 

0 out of 1 points  

The source of energy driving the transport of water through the xylem is

Selected Answer:  E.  Transpiration

  Question 4 

0 out of 1 points  

In a tropical rainforest, where there is abundant vegetation and rainfall, the soil contains

Selected Answer:  D.  Abundant anions and few cations due to soil acidity and leaching

  Question 5 

1 out of 1 points  

Plant growth is least influenced by

Selected Answer:  D.  Position of the moon

  Question 6 

0 out of 1 points  

The position of bean plant leaves is different at noon and at midnight.This change in position is probably influenced by changing

Selected Answer:  E.  Light conditions

  Question 7 

1 out of 1 points  

In response to external conditions, plants

Selected Answer:  E.  a, b and c

  Question 8 

1 out of 1 points  

Two cells are adjacent to one another. If Cell A has a water potential = -0.5 MPa and Cell B has a water potential = -1.0 MPa, then water molecules will

Selected Answer:  E.  Move from A to B at a greater rate than from B to A

  Question 9 

1 out of 1 points  

According to the pressure flow hypothesis

Selected Answer:  A.  Active transport moves sugars into sieve elements

  Question 10 

1 out of 1 points  

Just after the sun rises, the initial event that leads to the opening of stomatal pores is

Selected Answer:  E.  The active transport of K+ into guard cells from adjacent cells, lowering the water potential

  Question 11 

1 out of 1 points  

Which of the following does not perform a function of soil when plants are grown hydroponically?

Selected Answer:  A.  A greenhouse that stabilizes temperature

  Question 12 

0 out of 1 points  

If an animal brushes by a plant and tears off a leaf, what prevents the plant from losing sugar from the open wound on the stem?

Selected Answer:  A.  P-protein surges toward the sieve plates forming a P-protein plug

  Question 13 

0 out of 1 points  

If you want to produce a bushier shrub with more branches, you should

Selected Answer:  E.  Spray the plant with auxin

  Question 14 

1 out of 1 points  

Which of the following is an incorrect match of essential element and function?

Selected Answer:  D.  Manganese - structural component of chlorophyll

  Question 15 

1 out of 1 points  

Maple trees are unlikely to initiate an adaptive response to

Selected Answer:  D.  The leaching of phosphate from the soil

  Question 16 

1 out of 1 points  

When a plant cell is placed in deionized (pure) water

Selected Answer:  B.  Water diffuses into the cell because the water potential of the cell is more negative than the water potential of the deionized water

  Question 17 

1 out of 1 points  

Successive harvests of crops from a field are likely to deplete the soil of

Selected Answer:  E.  a, b and c

  Question 18 

0 out of 1 points  

Companion cells regularly communicate with their associated sieve tube members. The mechanism(s) involved may be

Selected Answer:  D.  By plasmodesmata

  Question 19 

0 out of 1 points  

Which of the following is true concerning nitrogen fixation?

Selected Answer:  A.  Free-living microorganisms usually fix nitrogen at a faster rate than symbiotic nitrogen-fixers

  Question 20 

1 out of 1 points  

When stomatal pores open at sunrise

Selected Answer:  E.  a, b, and c

  Question 21 

1 out of 1 points  

The loss of water through stomates is called

Selected Answer:  C.  Transpiration

  Question 22 

0 out of 1 points  

Plants growing in sterile soil would most likely exhibit leaves that

Selected Answer:  C.  Are yellow

  Question 23 

0 out of 1 points  

Nitrogen is mainly transported to developing plant parts in which chemical form?

Selected Answer:  E.  Nitrate

  Question 24 

1 out of 1 points  

Plants differ from animals because plants

Selected Answer:  A.  Make all the organic molecules they need; animals cannot

  Question 25 

0 out of 1 points  

Requirement(s) for phloem transport of sugars include

Selected Answer:  E.  a, b, and c

  Question 1 1 out of 1 points  

Plants growing in sterile soil would most likely exhibit leaves that

Selected Answer:  B.  Are a purple color

  Question 2 

1 out of 1 points  

Which of the following conditions promotes xylem transport of water?

Selected Answer:  C.  Dry, warm days

  Question 3 

0 out of 1 points  

If all of the fruits (seeds) on the outside of a strawberry are removed when it is young, it will not develop. If the strawberry is sprayed with a hormone solution, normal development occurs. The hormone most likely to cause a response is

Selected Answer:  B.  Cytokinin

  Question 4 

0 out of 1 points  

Plant auxins

Selected Answer:  C.  Act only in moderately high concentrations

  Question 5 

0 out of 1 points  

If a plant is placed in a horizontal position the

Selected Answer:  B.  a and c

  Question 6 

1 out of 1 points  

Long distance transport systems are adaptive in land plants because

Selected Answer:  D.  a and b

  Question 7 

1 out of 1 points  

As water flows from streams to rivers to oceans

Selected Answer:  D.  a and b

  Question 8 

0 out of 1 points  

Many farmers apply nitrogen in fertilizer in the form of ammonia. The form of nitrogen then taken up from the soil most often by plants is

Selected Answer:  D.  Ammonia

  Question 9 

1 out of 1 points  

The structure in mosses that produces an egg releases a chemical as it matures that attracts the flagellated sperm produced in a different structure. This is an example of

Selected Answer:  D.  Positive chemotaxis

  Question 10 

0 out of 1 points  

If seeds of a biennial plant, such as beet, are planted in Hawaii, the plants will

Selected Answer:  E.  Grow vegetatively, but will not flower at all due to incorrect day length

  Question 11 

1 out of 1 points  

In response to the presence of an insect, the leaf of a Venus' flytrap will close, trapping the insect. The closure is due to

Selected Answer:  B.  A rapid change in permeability of motor cell plasma membranes to potassium, causing potassium and then water to diffuse out of the cells

  Question 12 

1 out of 1 points  

Plants differ from animals because plants

Selected Answer:  C.  Make all the organic molecules they need; animals cannot

  Question 13 

1 out of 1 points  

Which is a true statement regarding element essentiality?

Selected Answer:  C.  The function of boron is unknown, but growth will not occur without it, therefore it is essential

  Question 14 

1 out of 1 points  

If a plant is deficient in phosphorus, a typical deficiency symptom would be

Selected Answer:  C.  Older leaves that are purple

  Question 15 

1 out of 1 points  

A plant cell and an animal cell, both with a water potential of –1.5 MPa, are placed in a beaker of deionized water. What happens in this system?

Selected Answer:  D.  Water diffuses into both cells; the animal cells bursts and the plant cell does not

  Question 16 

1 out of 1 points  

We are not confident that all plants require

Selected Answer:  A.  Boron

  Question 17 

0 out of 1 points  

The lipid component of a lipid/protein membrane is important to

Selected Answer:  B.  b and d

  Question 18 

1 out of 1 points  

When a plant cell is placed in deionized (pure) water

Selected Answer:  B.  Water diffuses into the cell because the water potential of the cell is more negative than the water potential of the deionized water

  Question 19 

1 out of 1 points  

To complete its life cycle, a grass plant requires 1 gram (gm) phosphorus, 3 gm calcium, 7 gm nitrogen, 0.25 gm iron, and 0.01 gm zinc. If the soil in a field has available 30 gm phosphorus, 600 gm calcium, 200 gm nitrogen, 5 gm iron and 1 gm zinc, then the supply of which element would most likely limit the growth of the grass population?

Selected Answer:  A.  Iron

  Question 20 

0 out of 1 points  

Cells of many large algae called kelps contain an iodine ion concentration up to 20,000 times the iodine ion concentration in seawater. The iodine ions move into these cells by

Selected Answer:  C.  Active transport directly through a membrane's lipid bilayer

  Question 21 

1 out of 1 points  

If an animal brushes by a plant and tears off a leaf, what prevents the plant from losing sugar from the open wound on the stem?

Selected Answer:  A.  c and d

  Question 22 

1 out of 1 points  

Just after the sun rises, the initial event that leads to the opening of stomatal pores is

Selected Answer:  A.  The active transport of K+ into guard cells from adjacent cells, lowering the water potential

  Question 23 

0 out of 1 points  

If you know in advance that a field will be temporarily flooded, an application of what hormone might help the plants survive?

Selected Answer:  A.  Ethylene

  Question 24 

1 out of 1 points  

If plants are grown in a soil deficient in molybdenum, nitrogen must be supplied in what form for the plants to survive?

Selected Answer:  E.  NH4

  Question 25 

0 out of 1 points  

If a plant cell is placed in deionized water the water potential of that cell becomes

Selected Answer:  E.  More positive because the osmotic potential becomes more negative

Question 1 1 out of 1 points  

Many farmers apply nitrogen in fertilizer in the form of ammonia. The form of nitrogen then taken up from the soil most often by plants is

Selected Answer:  B.  Nitrate

  Question 2 

0 out of 1 points  

If cubic meters of different soils are compared, in which is the total surface area of all particles greatest?

Selected Answer:  E.  Fine sand

  Question 3 

1 out of 1 points  

In response to external conditions, plants

Selected Answer:  E.  a, b and c

  Question 4 

1 out of 1 points  

Ethylene stimulates

Selected Answer:  E.  b and c

  Question 5 

1 out of 1 points  

Successive harvests of crops from a field are likely to deplete the soil of

Selected Answer:  E.  a, b and c

  Question 6 

1 out of 1 points  

Just after the sun rises, the initial event that leads to the opening of stomatal pores is

Selected Answer:  A.  The active transport of K+ into guard cells from adjacent cells, lowering the water potential

  Question 7 

0 out of 1 points  

A molecule that moves out of a cell is least likely to

Selected Answer:  C.  Move into an adjacent cell via a plasmodesma

  Question 8 

0 out of 1 points  

If the rate of auxin transport is measured in a stem segment that has been turned upside-down as in the accompanying diagram, it is found that the movement is

Selected Answer:  B.  From B to A and occurs at the normal rate

  Question 9 

1 out of 1 points  

When a plant cell is placed in deionized (pure) water

Selected Answer:  B.  Water diffuses into the cell because the water potential of the cell is more negative than the water potential of the deionized water

  Question 10 

0 out of 1 points  

To move sucrose molecules from leaves to roots, the sucrose molecules must enter sieve elements. This involves

Selected Answer:  E.  The pumping of sucrose molecules across the plasma membrane with their concentration gradient without the use of ATP

  Question 11 

1 out of 1 points  

If populations of free-living bacteria in the soil make nitrogen from the air available to organisms and that nitrogen is eventually absorbed and incorporated into plants, what is the most likely sequence of events in the soil and then in the plants?

Selected Answer:  E.  Nitrogen fixation →ammonia oxidation →nitrate reduction →nitrite reduction

  Question 12 

1 out of 1 points  

To complete its life cycle, a grass plant requires 1 gram (gm) phosphorus, 3 gm calcium, 7 gm nitrogen, 0.25 gm iron, and 0.01 gm zinc. If the soil in a field has available 30 gm phosphorus, 600 gm calcium, 200 gm nitrogen, 5 gm iron and 1 gm zinc, then the supply of which element would most likely limit the growth of the grass population?

Selected Answer:  D.  Iron

  Question 13 

1 out of 1 points  

Which of the following would be the worst form of nitrogen to apply in a fertilizer if the area has acidic soil and a relatively high amount of rainfall?

Selected Answer:  A.  NH4+

  Question 14 

1 out of 1 points  

Many fruits are harvested before they are ripe because it is easier to transport them in that stage of development. They must be transported in a partial vacuum mainly to

Selected Answer:  C.  Draw out ethylene that will hasten ripening

  Question 15 

1 out of 1 points  

Plants growing in sterile soil would most likely exhibit leaves that

Selected Answer:  B.  Are a purple color

  Question 16 

1 out of 1 points  

If you want to produce a bushier shrub with more branches, you should

Selected Answer:  A.  Pinch off the stem tips

  Question 17 

1 out of 1 points  

Companion cells regularly communicate with their associated sieve tube members. The mechanism(s) involved may be

Selected Answer:  E.  a, b and c

  Question 18 

0 out of 1 points  

If a plant produced a lower than normal supply of auxin

Selected Answer:  B.  Would not have as much xylem differentiation

  Question 19 

1 out of 1 points  

The lipid component of a lipid/protein membrane is important to

Selected Answer:  C.  Prevent hydrophilic ions and molecules from leaking out of a cell

  Question 20 

1 out of 1 points  

If a bulb is planted, its orientation does not matter because the

Selected Answer:  D.  a and b

  Question 21 

1 out of 1 points  

The source of energy driving the transport of water through the xylem is

Selected Answer:  E.  The sun

  Question 22 

1 out of 1 points  

You are growing a houseplant that begins to develop leaves that have green veins but dead tissue between the veins. This plant is most likely deficient in

Selected Answer:  D.  Manganese

  Question 23 

1 out of 1 points  

Rock weathering does not provide which essential element to plants?

Selected Answer:  A.  Nitrogen

  Question 24 

1 out of 1 points  

Water potential of a solution will become more positive by

Selected Answer:  D.  Putting it under pressure

  Question 25 

1 out of 1 points  

If a cell has a water potential of -0.3 MPa, water will diffuse from that cell toward a cell whose water potential is

Selected Answer:  E.  -0.4 MPa

Requirement(s) for phloem transport of sugars include    D.  a and b

If a plant is deficient in phosphorus, a typical deficiency symptom would be  A.  Older leaves that are purple

If a plant is to grow and reproduce, it must be supplied with a large quantity of  E.  Phosphorus

A plant is a short-night plant whose critical night length is 10 hours. To flower that plant must receive  D.  Nights shorter than 10 hours

Water potential of a solution will become more positive by  A.  Putting it under pressure

The only plant hormone that is a gas is  B.  Ethylene

If a cell has a water potential of -0.3 MPa, water will diffuse from that cell toward a cell whose water potential is  C.  -0.4 MPa

If all of the fruits (seeds) on the outside of a strawberry are removed when it is young, it will not develop. If the strawberry is sprayed with a hormone solution, normal development occurs. The hormone most likely to cause a response is  B.  Auxin

Flowers of night-blooming cereus are open at night and closed during the day. This is an example of a  C.  Photonastic response

If a flower opens at night and closes during the day, the response is  A.  Photonastic

 Question 1  1 out of 1 points    
Maple trees are unlikely to initiate an adaptive response to  
Selected Answer:  C.  The leaching of phosphate from the soil  

  Question 2  1 out of 1 points    
Flowers of night-blooming cereus are open at night and closed during the day. This is an example of a  
Selected Answer:  E.  Photonastic response  

  Question 3  1 out of 1 points    
Plants differ from animals because plants  
Selected Answer:  D.  Make all the organic molecules they need; animals cannot  

  Question 4  1 out of 1 points    
Requirement(s) for phloem transport of sugars include  
Selected Answer:  D.  a and b  

  Question 5  1 out of 1 points    
Plant growth is least influenced by  
Selected Answer:  C.  Position of the moon  

  Question 6  1 out of 1 points    
An element is considered to be essential for a plant if it is necessary  
Selected Answer:  D.  a and b  

  Question 7  0 out of 1 points    
You could induce vernalization in a beet plant by exposing which plant part to cold temperatures?  
Selected Answer:  D.  The large storage root  

  Question 8  1 out of 1 points    
Which of the following conditions promotes xylem transport of water?  
Selected Answer:  D.  Dry, warm days  

  Question 9  1 out of 1 points    
If a bulb is planted, its orientation does not matter because the  
Selected Answer:  D.  a and b  

  Question 10  0 out of 1 points    
Seeds of many temperate region plants break dormancy due to  
Selected Answer:  D.  A photomorphogenic response only  

  Question 11  0 out of 1 points    
A piece of mica is inserted in the tip of a grass coleoptile and the seedling is exposed to unilateral light as shown in the accompanying diagram. In response, the coleoptile  
Selected Answer:  E.  Bends toward the light because extra auxin is synthesized on the darker side  

  Question 12  1 out of 1 points    
If a plant is placed in a horizontal position the  
Selected Answer:  C.  Shoot bends upward due to increased auxin on the lower side  

  Question 13  1 out of 1 points    
At most plant nurseries, you can buy rooting powder that stimulates root development on stem cuttings. The rooting powder most likely contains  
Selected Answer:  D.  Synthetic auxins  

  Question 14  1 out of 1 points    
Soil provides plants with  
Selected Answer:  E.  All of the above  

  Question 15  1 out of 1 points    
Which of the following is true concerning nitrogen fixation?  
Selected Answer:  A.  The enzyme that catalyzes nitrogen fixation is nitrogenase  

  Question 16  1 out of 1 points    
Which of the following is an incorrect match between hormone and function?  
Selected Answer:  A.  Abscisic acid - releases buds from dormancy  

  Question 17  1 out of 1 points    
Plant auxins  
Selected Answer:  B.  Bind to receptor molecules to elicit a response  

  Question 18  1 out of 1 points    
In response to external conditions, plants  
Selected Answer:  E.  a, b and c  

  Question 19  1 out of 1 points    
Julius von Sachs established a nutrient solution containing calcium nitrate, potassium nitrate, potassium phosphate, and magnesium sulfate that would support plant growth. Because plants can grow in this solution, it can be concluded that  
Selected Answer:  C.  Further experimentation is necessary to prove or disprove plant nutrient requirements  

  Question 20  1 out of 1 points    
If cubic meters of different soils are compared, in which is the total surface area of all particles greatest?  
Selected Answer:  B.  Clay  

  Question 21  1 out of 1 points    
Vascular tissues enable a plant to do all of the following except  
Selected Answer:  D.  Prevent water loss  

  Question 22  1 out of 1 points    
Many plants flower in response to a change in day length. Plants with this adaptation probably have evolved in all of the following areas except  
Selected Answer:  B.  Equatorial Africa  

  Question 23  1 out of 1 points    
If a cell has a water potential of -0.3 MPa, water will diffuse from that cell toward a cell whose water potential is  
Selected Answer:  B.  -0.4 MPa  

  Question 24  0 out of 1 points    
The apical meristem of an actively growing woody stem is removed. If a mixture of paste and gibberellin is applied to the stem tip, cells produced by the vascular cambium will differentiate into  
Selected Answer:  C.  Parenchyma  

  Question 25  1 out of 1 points    
Just after the sun rises, the initial event that leads to the opening of stomatal pores is  
Selected Answer:  A.  The active transport of K+ into guard cells from adjacent cells, lowering the water potential

  Question 1  1 out of 1 points    
Under experimental conditions, how could you cause stomatal openings in a plant?  
Selected Answer:  D.  a and b  

  Question 2  1 out of 1 points    
A plant is a short-night plant whose critical night length is 10 hours. To flower that plant must receive  
Selected Answer:  E.  Nights shorter than 10 hours  

  Question 3  1 out of 1 points    
If the site of perception of an environmental stimulus is a leaf, then the site of transduction is a  
Selected Answer:  C.  Leaf  

  Question 4  1 out of 1 points    
In response to external conditions, plants  
Selected Answer:  E.  a, b and c  

  Question 5  1 out of 1 points    
If a plant produced a lower than normal supply of auxin  
Selected Answer:  E.  a, b, and c  

  Question 6  1 out of 1 points    
Rock weathering does not provide which essential element to plants?  
Selected Answer:  B.  Nitrogen  

  Question 7  1 out of 1 points    
If a plant is placed in a horizontal position the  
Selected Answer:  D.  Shoot bends upward due to increased auxin on the lower side  

  Question 8  1 out of 1 points    
Julius von Sachs established a nutrient solution containing calcium nitrate, potassium nitrate, potassium phosphate, and magnesium sulfate that would support plant growth. Because plants can grow in this solution, it can be concluded that  
Selected Answer:  C.  Further experimentation is necessary to prove or disprove plant nutrient requirements  

  Question 9  1 out of 1 points    
The principal pigment involved in photoperiodism and endogenous rhythms is  
Selected Answer:  B.  Phytochrome  

  Question 10  1 out of 1 points    
If you know in advance that a field will be temporarily flooded, an application of what hormone might help the plants survive?  
Selected Answer:  D.  Abscisic acid  

  Question 11  1 out of 1 points    
In response to the presence of an insect, the leaf of a Venus' flytrap will close, trapping the insect. The closure is due to  
Selected Answer:  B.  A rapid change in permeability of motor cell plasma membranes to potassium, causing potassium and then water to diffuse out of the cells  

  Question 12  1 out of 1 points    
Which of the following is an incorrect match of essential element and function?  
Selected Answer:  D.  Manganese - structural component of chlorophyll  

  Question 13  0 out of 1 points    
If the apical meristem of a woody stem is removed, all of the following would stop except  
Selected Answer:  E.  Axillary bud inhibition  

  Question 14  1 out of 1 points    
What prevents roots from losing absorbed phosphate back into the soil?  
Selected Answer:  D.  The Casperian strip of the endodermal cells  

  Question 15  1 out of 1 points    
Which is a true statement regarding element essentiality?  
Selected Answer:  B.  The function of boron is unknown, but growth will not occur without it, therefore it is essential  

  Question 16  1 out of 1 points    
If seeds of a biennial plant, such as beet, are planted in Hawaii, the plants will  
Selected Answer:  D.  Grow vegetatively, but will not flower at all due to high temperatures  

  Question 17  1 out of 1 points    
Flowers of night-blooming cereus are open at night and closed during the day. This is an example of a  
Selected Answer:  D.  Photonastic response  

  Question 18  0 out of 1 points    
A basic difference between most algae and an oak tree is that  
Selected Answer:  C.  The algae use active transport to move water, the oak tree does not  

  Question 19  1 out of 1 points    
According to the pressure flow hypothesis  
Selected Answer:  E.  Active transport moves sugars into sieve elements  

  Question 20  1 out of 1 points    
If a plant is to grow and reproduce, it must be supplied with a large quantity of  
Selected Answer:  D.  Phosphorus  

  Question 21  1 out of 1 points    
Gardeners often add peat moss to soil so that water is retained within the soil and does not drain away as rapidly. A gardener would be most likely to add peat moss to soil that is  
Selected Answer:  D.  Coarse sand  

  Question 22  1 out of 1 points    
If plants are grown in a soil deficient in molybdenum, nitrogen must be supplied in what form for the plants to survive?  
Selected Answer:  C.  NH4  

  Question 23  1 out of 1 points    
If cubic meters of different soils are compared, in which is the total surface area of all particles greatest?  
Selected Answer:  B.  Clay  

  Question 24  1 out of 1 points    
The loss of water through stomates is called  
Selected Answer:  A.  Transpiration  

  Question 25  0 out of 1 points    
Which of the plants will flower if the blocked area is exposed to short-days?  
Selected Answer:  E.  1,2,3, both branches of 4

Coleus plants can be propagated through stem cuttings if they are placed in a medium containing rooting powder, a form of

Selected Answer: C. Auxin

  Question 2	1 out of 1 points  

Many plants flower in response to a change in day length. Plants with this adaptation probably have evolved in all of the following areas except

Selected Answer: C. Equatorial Africa

  Question 3	1 out of 1 points  

Plant growth is least influenced by

Selected Answer: C. Position of the moon

  Question 4	1 out of 1 points  

Water moves from the soil into the xylem of a root via

Selected Answer: E. Diffusion and osmosis

  Question 5	1 out of 1 points  

Which of the following is true concerning nitrogen fixation?

Selected Answer: B. The enzyme that catalyzes nitrogen fixation is nitrogenase

  Question 6	1 out of 1 points  

Requirement(s) for phloem transport of sugars include

Selected Answer: D. a and b

  Question 7	1 out of 1 points  

Ethylene stimulates

Selected Answer: E. b and c

  Question 8	1 out of 1 points  

Which of the following does not perform a function of soil when plants are grown hydroponically?

Selected Answer: B. A greenhouse that stabilizes temperature

  Question 9	0 out of 1 points  

A plant with a mutation for phototropin would

Selected Answer: E. Bend toward a window

  Question 10	1 out of 1 points  

To move sucrose molecules from leaves to roots, the sucrose molecules must enter sieve elements. This involves

Selected Answer: A. The use of ATP to pump sucrose molecules against their concentration gradient across the plasma membrane

  Question 11	1 out of 1 points  

To complete its life cycle, a grass plant requires 1 gram (gm) phosphorus, 3 gm calcium, 7 gm nitrogen, 0.25 gm iron, and 0.01 gm zinc. If the soil in a field has available 30 gm phosphorus, 600 gm calcium, 200 gm nitrogen, 5 gm iron and 1 gm zinc, then the supply of which element would most likely limit the growth of the grass population?

Selected Answer: A. Iron

  Question 12	1 out of 1 points  

A plant is a short-night plant whose critical night length is 10 hours. To flower that plant must receive

Selected Answer: A. Nights shorter than 10 hours

  Question 13	1 out of 1 points  

Which of the following is true?

Selected Answer: A. The contents of the phloem are under pressure and the contents of the xylem are under tension

  Question 14	1 out of 1 points  

Maple trees are unlikely to initiate an adaptive response to

Selected Answer: C. The leaching of phosphate from the soil

  Question 15	1 out of 1 points  

Hormones usually

Selected Answer: E. All of the above

  Question 16	1 out of 1 points  

The interior of root nodules containing nitrogen-fixing bacteria is often pink due to leghemoglobin, which is similar to human hemoglobin. The function of leghemoglobin would most likely be to

Selected Answer: D. Tie up O2, reducing its concentration in the nodules

  Question 17	0 out of 1 points  

The position of bean plant leaves is different at noon and at midnight.This change in position is probably influenced by changing

Selected Answer: D. Relative humidity

  Question 18	1 out of 1 points  

Two cells are adjacent to one another. If Cell A has a water potential = -0.5 MPa and Cell B has a water potential = -1.0 MPa, then water molecules will

Selected Answer: B. Move from A to B at a greater rate than from B to A

  Question 19	1 out of 1 points  

In temperate regions, the main way plants detect seasons of the year is through

Selected Answer: A. Day length

  Question 20	1 out of 1 points  

If a plant is to grow and reproduce, it must be supplied with a large quantity of

Selected Answer: B. Phosphorus

  Question 21	1 out of 1 points  

Which is a true statement regarding element essentiality?

Selected Answer: C. The function of boron is unknown, but growth will not occur without it, therefore it is essential

  Question 22	0 out of 1 points  

If a plant cell is placed in deionized water the water potential of that cell becomes

Selected Answer: E. More negative because the osmotic potential becomes more positive

Question 1	1 out of 1 points  

Which of the following is not a major function of some leaves?

Selected Answer: A. Wood production

  Question 2	1 out of 1 points  

In a pine tree, the type of cell used to move water and minerals from one part to another is a

Selected Answer: A. Tracheid

  Question 3	1 out of 1 points  

You would not expect roots to

Selected Answer: A. None of the above; all are possible in some plants

  Question 4	1 out of 1 points  

Palm trees, which are monocots, can increase in diameter every year due to the production of additional

Selected Answer: B. Adventitious roots

  Question 5	1 out of 1 points  

In aquatic plants, oxygen moves to the roots through large interconnected air spaces in the leaves, stems, and roots. These air spaces are most likely to be in what type of tissue?

Selected Answer: B. Parenchyma

  Question 6	1 out of 1 points  

Which of the following is not a function of parenchyma?

Selected Answer: D. Long distance transport of water

  Question 7	1 out of 1 points  

Xylem vessels, found in angiosperms, have a much greater internal diameter than tracheids, the only xylem conducting cells found in gymnosperms. The tallest living trees, redwoods, are gymnosperms. Which of the following is an advantage of tracheids over vessels for long-distance transport to great heights?

Selected Answer: Adhesive forces are proportionally greater in narrower cylinders than in wider cylinders. Cohesive forces are greater in narrow tubes than in wide tubes of the same height.

  Question 8	1 out of 1 points  

The purpose of the xylem is to _______. (Concept 36.1)

Selected Answer: transport water and minerals from roots to shoots

  Question 9	1 out of 1 points  

The order of tissues encountered in the midrib section of a endicot leaf, from top to bottom would be

Selected Answer: B. Upper epidermis ---> palisade parenchyma ---> xylem ---> phloem ---> spongy mesophyll ---> lower epidermis

  Question 10	1 out of 1 points  

Which of the following is an adaptation that enhances the uptake of water and minerals by roots?

Selected Answer: active uptake

  Question 11	1 out of 1 points  

A typical monocot plant has a root system consisting of

Selected Answer: C. Adventitious roots and lateral roots

  Question 12	1 out of 1 points  

Which of the following is not a function of some types of leaves?

Selected Answer: D. Wood production

  Question 13	1 out of 1 points  

As a new lateral root grows, it destroys tissues of the parent root in what order?

Selected Answer: C. Endodermis, cortex, epidermis

  Question 14	1 out of 1 points  

One characteristic that distinguishes spongy mesophyll from palisade parenchyma is

Selected Answer: A. The loose arrangement of cells in the spongy mesophyll

  Question 15	1 out of 1 points  

In plant roots, the Casparian strip is correctly described by which of the following?

Selected Answer: It ensures that all water and dissolved substances must pass through a cell membrane before entering the stele.

  Question 16	1 out of 1 points  

Root nodules form primarily in which tissue?

Selected Answer: B. Cortex

  Question 17	1 out of 1 points  

Perennial plants are likely to store a majority of their carbohydrates in storage roots during the winter because

Selected Answer: B. Temperature and humidity are more stable in the soil than above ground

  Question 18	1 out of 1 points  

Root caps secrete

Selected Answer: E. Mucigel to lubricate root growth through the soil

  Question 19	1 out of 1 points  

If you discovered a new plant that had sharp projections on its stems, what type of cells would you expect to find in abundance in those projections?

Selected Answer: B. Fibers

  Question 20	1 out of 1 points  

Sometimes plants store food as fats rather than starch. In what plant part is this more likely to occur and for what reason?

Selected Answer: E. Seeds for easier dispersal by animals

  Question 21	1 out of 1 points  

Pericycle cells are

Selected Answer: E. Parenchyma cells that divide to form lateral roots

  Question 22	1 out of 1 points  

Minerals entering the xylem must first go through endodermal cells because suberin and lignin are found in the cells'

Selected Answer: A. Side, top, and bottom walls

  Question 23	1 out of 1 points  

What type of cell is responsible for a majority of a plant's metabolism because it is the most numerous in the plant?

Selected Answer: A. Parenchyma

  Question 24	1 out of 1 points  

In what structure would you most likely expect to find sclerenchyma as the main supporting tissue?

Selected Answer: C. Mature stems

  Question 25	1 out of 1 points  

A root is not uniform along its length, but has distinct zones. Starting at the tip, these zones are

Selected Answer: D. Root cap ---> apical meristem ---> zone of elongation ---> zone of maturation/root hairs