Question 1

What happens when a large amount of water enters a plant cell?

Accepted Answer

A)   Entry of the water will increase as the water potential increases.
B)   The cell will eventually become turgid,with no more net entry of water.
C)   The water will move toward the region of more positive water potential.
D)   The turgor pressure of the cell will be reduced.
E)   The entry of the water will cause increased active transport into the cell.

Question 2

The flow rate in the phloem can be as high as _______ cm per hour.

Accepted Answer

A)   0.01
B)   0.1
C)   1
D)   10
E)   100

Question 3

A newly discovered kind of coconut plant has leaves with increased uptake of CO2 compared to leaves of other types of coconuts.What modification might best account for the difference?

Accepted Answer

A)   Thicker waxy cuticle
B)   Lower rate of water vapor loss
C)   Lack of response to darkness
D)   Electric imbalance in guard cells
E)   Stomata that are more open

Question 4

Researchers discover that a species of maple tree cannot survive and complete its life cycle without tiny amounts of cadmium.For this tree,cadmium is a(n)

Accepted Answer

A)   macromolecule.
B)   macronutrient.
C)   essential element.
D)   amino acid.
E)   essential micronutrient.

Question 5

The richest topsoils for agriculture are composed of

Accepted Answer

A)   clay.
B)   sand.
C)   organic matter.
D)   silt.
E)   All of the above

Question 6

Which of the following represents the correct order of soil horizons that you would encounter if you started digging in your garden?

Accepted Answer

A)   Parent rock  →\rightarrow→   subsoil  →\rightarrow→  topsoil
B)   Topsoil  →\rightarrow→   subsoil  →\rightarrow→   parent rock
C)   Topsoil  →\rightarrow→   parent rock  →\rightarrow→  subsoil
D)   Parent rock  →\rightarrow→   topsoil →\rightarrow→  subsoil
E)   Subsoil  →\rightarrow→   parent rock  →\rightarrow→   topsoil

Question 7

One function of abscisic acid is

Accepted Answer

A)   the storage of CO2 for daytime use.
B)   the reduction of water loss from the plant.
C)   the opening of stomata.
D)   increased H+ pumping in guard cells.
E)   a lowering of pH in mesophyll cells.

Question 8

Your lab supervisor asks you to apply a stain to a section of spinach leaf and says that the stain will produce a color only in the apoplast.Which structure(s) will be colored?

Accepted Answer

A)   Cell membranes
B)   Plasmodesmata
C)   Cell walls
D)   Cytoplasm
E)   Vacuoles C

Question 9

Plants do not depend on soil for

Accepted Answer

A)   O2 for root respiration.
B)   the services of other soil organisms,including bacteria,fungi,protists,and animals such as earthworms and arthropods.
C)   CO2.
D)   anchorage for mechanical support of the shoot.
E)   mineral nutrients and water.

Question 10

Soil scientists recognize _______ major soil horizons: _______.

Accepted Answer

A)   two;A and B
B)   four;top,top middle,middle,and lower
C)   seven;1,2,3,4,5,6,and 7
D)   two;upper and lower
E)   three;A,B,and C

Question 11

Pumping protons (H+) out of a cell can trigger the movement of

Accepted Answer

A)   K+ out of the cell and Cl- into the cell.
B)   K+ into the cell and Cl- out of the cell.
C)   both K+ and Cl- out of the cell.
D)   both K+ and Cl- into the cell.
E)   K+ into the cell,with no movement of Cl-. D

Question 12

The facilitated diffusion of ions from the soil solution into root cells requires

Accepted Answer

A)   an identical concentration of ions on both sides of the root cell membranes.
B)   a concentration of ions outside the root cells that is lower than the concentration inside the cells.
C)   the expenditure of ATP.
D)   specific channel proteins in the membranes.
E)   cellular respiration. D

Question 13

You spot a wilted impatiens plant on the windowsill.This wilting occurs when the _______ of a plant's cells is _______.

Accepted Answer

A)   water potential;high
B)   turgor pressure;high
C)   interior solute concentration;high
D)   solute potential;high
E)   turgor pressure;low

Question 14

If a tree is girdled when its leaves are expanded and photosynthetically active,the bark will swell in the region _______ the girdle,and the _______ will die before the rest of the tree.

Accepted Answer

A)   below;roots
B)   below;branches
C)   below;leaves
D)   above;roots
E)   above;branches

Question 15

In order to transport K+ ions into their cells,plants use

Accepted Answer

A)   ATP to pump H+ out.
B)   a sodium-potassium pump.
C)   ATP to pump K+ in.
D)   ATP to pump water in.
E)   a proton pump to pump water in.

Question 16

A botanist performs a series of experiments in which different possible sources of hydrogen to be used by plants are radioactively labeled.When photosynthetically derived compounds from the plants are later examined,their hydrogen will be found to have come from which source?

Accepted Answer

A)   The atmosphere
B)   Soil minerals
C)   Water
D)   Other plants
E)   Fungi

Question 17

_______ are available to the plant in unlimited supply _______.

Accepted Answer

A)   Water and nitrogen;because there is plenty of soil around the plant
B)   Sulfur and magnesium;because the plant needs relatively small amounts from the soil
C)   Phosphorus and iron;because they readily dissolve in soil water
D)   Calcium and chlorine;because they are easily absorbed by the roots
E)   Hydrogen and oxygen;as long as sufficient water is available

Question 18

Which four elements are found in highest concentration in plants?

Accepted Answer

A)   Phosphorus,calcium,hydrogen,carbon
B)   Magnesium,phosphorus,calcium,potassium
C)   Magnesium,iron,phosphorus,potassium
D)   Carbon,hydrogen,oxygen,nitrogen
E)   Carbon,hydrogen,oxygen,potassium

Question 19

The industrial production of nitrogen-containing fertilizer is currently limited by

Accepted Answer

A)   its high energy expense.
B)   the inability to insert nitrogenase genes into plants.
C)   the lack of nitrogenase for the industrial process.
D)   the limited supply of N2 gas.
E)   the need to exclude free oxygen in the process.

Question 20

Plants obtain all of the following elements from the soil except

Accepted Answer

A)   carbon.
B)   nitrogen.
C)   potassium.
D)   sulfur.
E)   zinc.

Exam 25: Plant Nutrition and Transport

What happens when a large amount of water enters a plant cell?

Correct AnswerverifiedShow Answer

The flow rate in the phloem can be as high as _______ cm per hour.

Correct AnswerverifiedShow Answer

A newly discovered kind of coconut plant has leaves with increased uptake of CO2 compared to leaves of other types of coconuts.What modification might best account for the difference?

Correct AnswerverifiedShow Answer

Researchers discover that a species of maple tree cannot survive and complete its life cycle without tiny amounts of cadmium.For this tree,cadmium is a(n)

Correct AnswerverifiedShow Answer

The richest topsoils for agriculture are composed of

Correct AnswerverifiedShow Answer

Which of the following represents the correct order of soil horizons that you would encounter if you started digging in your garden?

Correct AnswerverifiedShow Answer

One function of abscisic acid is

Correct AnswerverifiedShow Answer

Your lab supervisor asks you to apply a stain to a section of spinach leaf and says that the stain will produce a color only in the apoplast.Which structure(s) will be colored?

Correct AnswerverifiedC

Plants do not depend on soil for

Correct AnswerverifiedShow Answer

Soil scientists recognize _______ major soil horizons: _______.

Correct AnswerverifiedShow Answer

Pumping protons (H+) out of a cell can trigger the movement of

Correct AnswerverifiedD

The facilitated diffusion of ions from the soil solution into root cells requires

Correct AnswerverifiedD

You spot a wilted impatiens plant on the windowsill.This wilting occurs when the _______ of a plant's cells is _______.

Correct AnswerverifiedShow Answer

If a tree is girdled when its leaves are expanded and photosynthetically active,the bark will swell in the region _______ the girdle,and the _______ will die before the rest of the tree.

Correct AnswerverifiedShow Answer

In order to transport K+ ions into their cells,plants use

Correct AnswerverifiedShow Answer

A botanist performs a series of experiments in which different possible sources of hydrogen to be used by plants are radioactively labeled.When photosynthetically derived compounds from the plants are later examined,their hydrogen will be found to have come from which source?

Correct AnswerverifiedShow Answer

_______ are available to the plant in unlimited supply _______.

Correct AnswerverifiedShow Answer

Which four elements are found in highest concentration in plants?

Correct AnswerverifiedShow Answer

The industrial production of nitrogen-containing fertilizer is currently limited by

Correct AnswerverifiedShow Answer

Plants obtain all of the following elements from the soil except

Correct AnswerverifiedShow Answer

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A newly discovered kind of coconut plant has leaves with increased uptake of CO₂ compared to leaves of other types of coconuts.What modification might best account for the difference?

Correct Answer
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C

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Soil scientists recognize _ major soil horizons: _.

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Pumping protons (H⁺) out of a cell can trigger the movement of

Correct Answer
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D

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D

You spot a wilted impatiens plant on the windowsill.This wilting occurs when the _ of a plant's cells is _.

Correct Answer
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If a tree is girdled when its leaves are expanded and photosynthetically active,the bark will swell in the region _ the girdle,and the _ will die before the rest of the tree.

Correct Answer
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In order to transport K⁺ ions into their cells,plants use

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_ are available to the plant in unlimited supply _.

Correct Answer
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