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