Question 1

The energy that drives water into root cortex cells comes most directly from

Accepted Answer

A)   ATP.
B)   the sun.
C)   NADPH+.
D)   bulk flow.
E)   chloroplasts.F) A) and B)
G) A) and C)

Question 2

In most plants,the stomata at night are _______ in order to _______.

Accepted Answer

A)   open;take in water
B)   open;take in CO2
C)   closed;prevent water loss
D)   closed;prevent CO2 loss
E)   closed;exclude O2F) A) and C)
G) All of the above

Question 3

In almost all plants,roots get most of their oxygen from

Accepted Answer

A)   air spaces in the soil.
B)   water in the soil.
C)   the leaves,by way of the phloem.
D)   the leaves,which get oxygen from the air.
E)   root hairs.F) B) and C)
G) B) and D)

Question 4

Most soils can have as many as _______ horizons.

Accepted Answer

The answer of Most soils can have as many as...

Question 5

The unbroken column of water from the roots to the highest leaves is kept intact by

Accepted Answer

A)   tension.
B)   transpiration.
C)   atmospheric pressure.
D)   cohesion.
E)   evaporation.F) B) and C)
G) A) and C)

Question 6

Endodermal cells differ from other root cells in that they

Accepted Answer

A)   lack a symplast region.
B)   are nonselective with regard to solute uptake.
C)   have a high rate of water transport.
D)   are completely surrounded by a waxy layer.
E)   prevent the apoplastic movement of water and ions.F) All of the above
G) B) and E)

Question 7

According to the pressure flow model for translocation,

Accepted Answer

A)   sugar concentration is highest near the sink area.
B)   water enters the sieve tube by osmosis.
C)   sugar is transported out of the sieve tubes near the source area.
D)   osmosis accomplishes the bulk flow of water and nutrients.
E)   little ATP expenditure is required for translocation.F) C) and D)
G) A) and E)

Question 8

Plants acquire minerals

Accepted Answer

A)   from the soil solution.
B)   by growing toward them.
C)   from rainwater.
D)   from soil microbes.
E)   by recycling them.F) A) and B)
G) C) and D)

Question 9

Ion exchange allows plant roots to

Accepted Answer

A)   break down and dissolve minerals in the soil by acidifying the immediate soil environment.
B)   use protons pumped from root cells to bind to nutrients.
C)   counteract the leaching of nutrients.
D)   release protons in return for positively charged nutrients that are bound to soil particles.
E)   carry out respiration efficiently.F) A) and B)
G) C) and E)

Question 10

Which statement about mycorrhizae is true?

Accepted Answer

A)   They increase the functional surface area of a root system.
B)   They involve an interaction between a bacterium and a plant.
C)   They are very unusual in nature and are found only in specialized plant groups.
D)   They spread via plant seeds.
E)   They form structures that exclude oxygen.F) All of the above
G) A) and D)

Question 11

Which of the following represents the correct order for the locations where rhizobia develop as a root nodule is being formed,from earliest to latest in the development?

Accepted Answer

A)   Soil  →\rightarrow→   root hair  →\rightarrow→   cortex
B)   Soil  →\rightarrow→   cortex  →\rightarrow→   root hair
C)   Root hair  →\rightarrow→   cortex  →\rightarrow→   soil
D)   Root hair  →\rightarrow→   soil  →\rightarrow→   cortex
E)   Cortex  →\rightarrow→   soil  →\rightarrow→   root hair F) A) and B)
G) B) and C)

Question 12

Where would you look to find the Casparian strips in a prepared microscope slide of root tissue?

Accepted Answer

A)   In the symplast
B)   In the epidermis
C)   In the apoplast
D)   In the endodermis
E)   In a layer of pericycle cellsF) A) and D)
G) B) and E)

Question 13

The tension required to move water up the stem is generated from the

Accepted Answer

A)   stems.
B)   root hairs.
C)   leaves.
D)   roots.
E)   guard cells.F) A) and B)
G) A) and C)

Question 14

Chemical weathering,an important part of soil formation,includes the

Accepted Answer

A)   water-based breakdown of rock.
B)   effects of freezing and thawing.
C)   leaching of nutrients.
D)   crushing of rock.
E)   drying of soils.F) A) and B)
G) A) and C)

Question 15

The evaporative loss of water from the leaf is called

Accepted Answer

A)   translocation.
B)   transformation.
C)   transportation.
D)   transpiration.
E)   transcention.F) B) and D)
G) C) and E)

Question 16

If you were working in the lab with nitrogenase,and the nitrogenase stopped catalyzing the reaction,you might need to eliminate or reduce the _______ in the experimental system to get it working again.

Accepted Answer

A)   hydrogen
B)   calcium carbonate
C)   water
D)   CO2
E)   oxygenF) B) and C)
G) A) and E)

Question 17

Researchers conducting a study of leaf cell structure observe water entering the cells of a leaf from droplets on its surface.They conclude that the leaf cells have

Accepted Answer

A)   a high turgor pressure due to cell wall rigidity.
B)   a high,positive water potential.
C)   an interior solute concentration like that of distilled water.
D)   a more negative water potential than the water has.
E)   reached equilibrium.F) A) and E)
G) D) and E)

Question 18

In the legume-rhizobia symbiosis,the _______ partner produces leghemoglobin to maintain _______ levels for the other partner.

Accepted Answer

A)   legume;low oxygen
B)   rhizobia;low oxygen
C)   legume;high nitrogen
D)   rhizobia;high nitrogen
E)   legume;high sugarF) B) and D)
G) B) and C)

Question 19

The part of the root that is most important for building the bulk of a root nodule is the

Accepted Answer

A)   epidermis.
B)   cortex.
C)   xylem.
D)   phloem.
E)   root hair.F) B) and E)
G) A) and B)

Question 20

The process of nitrogen fixation is the

Accepted Answer

A)   uptake of atmospheric nitrogen by plants.
B)   conversion of atmospheric nitrogen into ammonia.
C)   production of nitrogen-bearing compounds in plants.
D)   release of nitrogen into the atmosphere.
E)   release of ammonia into the atmosphere.F) B) and E)
G) D) and E)

Exam 25: Plant Nutrition and Transport

In most plants,the stomata at night are _______ in order to _______.

Correct AnswerverifiedShow Answer

The tension required to move water up the stem is generated from the

Correct AnswerverifiedShow Answer

The process of nitrogen fixation is the

Correct AnswerverifiedShow Answer

The part of the root that is most important for building the bulk of a root nodule is the

Correct AnswerverifiedShow Answer

Which statement about mycorrhizae is true?

Correct AnswerverifiedShow Answer

If you were working in the lab with nitrogenase,and the nitrogenase stopped catalyzing the reaction,you might need to eliminate or reduce the _______ in the experimental system to get it working again.

Correct AnswerverifiedShow Answer

In the legume-rhizobia symbiosis,the _______ partner produces leghemoglobin to maintain _______ levels for the other partner.

Correct AnswerverifiedShow Answer

Which of the following represents the correct order for the locations where rhizobia develop as a root nodule is being formed,from earliest to latest in the development?

Correct AnswerverifiedShow Answer

Ion exchange allows plant roots to

Correct AnswerverifiedShow Answer

Endodermal cells differ from other root cells in that they

Correct AnswerverifiedShow Answer

Plants acquire minerals

Correct AnswerverifiedShow Answer

The energy that drives water into root cortex cells comes most directly from

Correct AnswerverifiedShow Answer

The unbroken column of water from the roots to the highest leaves is kept intact by

Correct AnswerverifiedShow Answer

The evaporative loss of water from the leaf is called

Correct AnswerverifiedShow Answer

In almost all plants,roots get most of their oxygen from

Correct AnswerverifiedShow Answer

Most soils can have as many as _______ horizons.

Correct AnswerverifiedShow Answer

Where would you look to find the Casparian strips in a prepared microscope slide of root tissue?

Correct AnswerverifiedShow Answer

According to the pressure flow model for translocation,

Correct AnswerverifiedShow Answer

Chemical weathering,an important part of soil formation,includes the

Correct AnswerverifiedShow Answer

Researchers conducting a study of leaf cell structure observe water entering the cells of a leaf from droplets on its surface.They conclude that the leaf cells have

Correct AnswerverifiedShow Answer

In most plants,the stomata at night are _ in order to _.

Correct Answer
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In the legume-rhizobia symbiosis,the _ partner produces leghemoglobin to maintain _ levels for the other partner.

Correct Answer
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