Question 1

Analysis of the nutrient content of phloem is performed on phloem sap that is made available when an aphid is cut away from its stylet.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following is NOT involved in mineral uptake by plant roots?

Accepted Answer

A)   root nodules that fix atmospheric nitrogen
B)   cuticles that protect surfaces
C)   root hairs that increase surface area
D)   expending energy in uptake/active transportE) None of the above
F) C) and D)

Question 3

Sieve tube members are connected by

Accepted Answer

A)   sieve plates.
B)   tight junctions.
C)   companion cells.
D)   tracheids.E) A) and C)
F) None of the above

Question 4

Water moves into the guard cells in response to the movement of K+ into the guard cells.

Accepted Answer

A) True 
 B)False

Question 5

All of the following statements about the cohesion-tension model are true EXCEPT

Accepted Answer

A)   there is no expenditure of energy.
B)   it is a model of how water and minerals are transported in xylem.
C)   it is dependent on the cohesive and adhesive properties of water.
D)   tension created by transpiration in the leaves pulls water along the phloem from the roots hairs to the leaves.E) None of the above
F) C) and D)

Question 6

Some plants are not photosynthetic and must depend upon bacteria in their root nodules for nutrients.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following particles are retained by clay soil and exchanged for hydrogen ions when plants take them up?

Accepted Answer

A)   calcium & potassium
B)   calcium & ammonium
C)   sodium & sulphur
D)   iron & boron
E)   calcium & copperF) B) and D)
G) B) and C)

Question 8

Which statement is NOT true about water uptake in a plant root?

Accepted Answer

A)   Water enters the root from the soil by osmosis.
B)   Water enters the cytoplasm of the root hairs by active transport.
C)   Water travels by diffusion through the cell walls of the epidermis and cortex.
D)   Water must enter the cytoplasm of the endodermal cells to get past the Casparian strip.E) A) and B)
F) C) and D)

Question 9

The coastal wetlands are losing soil at an alarming rate. In Louisiana, it is estimated that 24 mi2 of wetlands are lost each year, which equates to one football field every 38 minutes. Why is the loss of these wetlands so critical?

Accepted Answer

The loss of wetlands is a critical issue...

Question 10

Essential plant nutrients include carbon, potassium, calcium, and nitrogen.

Accepted Answer

A) True 
 B)False

Question 11

Which force pushes water into the xylem as osmosis moves water into the root?

Accepted Answer

A)   water stress
B)   atmospheric pressure
C)   root pressure
D)   guttation
E)   transpirationF) C) and D)
G) C) and E)

Question 12

Which type of soil will supply nutrients to plants while its acidity leaches minerals from rock?

Accepted Answer

A)   humus
B)   clay
C)   sand
D)   loamE) B) and D)
F) None of the above

Question 13

Which force is responsible for moving water up to the tops of the trees?

Accepted Answer

A)   water stress
B)   atmospheric pressure
C)   root pressure
D)   guttation
E)   transpirationF) B) and C)
G) B) and D)

Question 14

Describe the steps required for a plant to uptake minerals from the environment.

Accepted Answer

Answers may vary slightly but should inc...

Question 15

Which statement is NOT true about stomata?

Accepted Answer

A)   As guard cells become turgid, the stomates open.
B)   There are two guard cells around each stomate.
C)   Guard cells take up potassium ions and water enters the guard cells.
D)   The blue light component of sunlight is a signal that can cause stomata to close.
E)   Stomates open and close on a daily basis, even if kept in the dark, on a circadian rhythm.F) B) and C)
G) A) and E)

Question 16

Entry of mineral ions into the xylem is regulated by cells of the cortex.

Accepted Answer

A) True 
 B)False

Question 17

Arrange the soil particles according to size, from largest to smallest: silt, clay, and sand. Briefly describe the content of loam soils in terms of these three particles and tell why loam soils are the most productive.

Accepted Answer

Arrangement of soil particles from large...

Question 18

Which of the following conducting cells are associated with xylem?

Accepted Answer

A)   tracheids & vessel elements
B)   sieve-tube members & companion cells
C)   vessel elements & companion cells
D)   sieve-tube members & vessel elements
E)   tracheids & sieve-tube membersF) B) and E)
G) All of the above

Question 19

How can researchers confirm that phloem moves from a source to a sink?

Accepted Answer

A)   They can observe aphids and cut off their beaks.
B)   They can study the cause of maple sap flow in producing syrup.
C)   They can observe the effects of girdling a tree below the level of the majority of leaves.
D)   They can use radioactive tracers to measure the flow of sap between two distances over time.
E)   They can observe the uptake of ink into the stem of celery.F) All of the above
G) D) and E)

Question 20

Stomata closure in darkened environment, at time zero, with air (0.03% CO2)  or CO2-free airflow through leaf. (Note: A decrease in conductance indicates inactivation of the proton pump.)  2)  or CO2-free airflow through leaf. (Note: A decrease in conductance indicates inactivation of the proton pump.)    A)  Supports both Hypothesis I and II. B)  Supports only Hypothesis I. C)  Supports only Hypothesis II. D)  Supports neither hypothesis. " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   Supports both Hypothesis I and II.
B)   Supports only Hypothesis I.
C)   Supports only Hypothesis II.
D)   Supports neither hypothesis.E) A) and B)
F) All of the above

Exam 25: Flowering Plants: Nutrition and Transport

Analysis of the nutrient content of phloem is performed on phloem sap that is made available when an aphid is cut away from its stylet.

Correct AnswerverifiedShow Answer

Which of the following conducting cells are associated with xylem?

Correct AnswerverifiedShow Answer

Which of the following is NOT involved in mineral uptake by plant roots?

Correct AnswerverifiedShow Answer

Stomata closure in darkened environment, at time zero, with air (0.03% CO2) or CO2-free airflow through leaf. (Note: A decrease in conductance indicates inactivation of the proton pump.)

Correct AnswerverifiedShow Answer

All of the following statements about the cohesion-tension model are true EXCEPT

Correct AnswerverifiedShow Answer

Which statement is NOT true about stomata?

Correct AnswerverifiedShow Answer

Which statement is NOT true about water uptake in a plant root?

Correct AnswerverifiedShow Answer

Which force pushes water into the xylem as osmosis moves water into the root?

Correct AnswerverifiedShow Answer

Arrange the soil particles according to size, from largest to smallest: silt, clay, and sand. Briefly describe the content of loam soils in terms of these three particles and tell why loam soils are the most productive.

Correct AnswerverifiedArrangement of soil particles from large...View AnswerShow Answer

Describe the steps required for a plant to uptake minerals from the environment.

Correct AnswerverifiedAnswers may vary slightly but should inc...View AnswerShow Answer

How can researchers confirm that phloem moves from a source to a sink?

Correct AnswerverifiedShow Answer

The coastal wetlands are losing soil at an alarming rate. In Louisiana, it is estimated that 24 mi2 of wetlands are lost each year, which equates to one football field every 38 minutes. Why is the loss of these wetlands so critical?

Correct AnswerverifiedThe loss of wetlands is a critical issue...View AnswerShow Answer

Which type of soil will supply nutrients to plants while its acidity leaches minerals from rock?

Correct AnswerverifiedShow Answer

Sieve tube members are connected by

Correct AnswerverifiedShow Answer

Which of the following particles are retained by clay soil and exchanged for hydrogen ions when plants take them up?

Correct AnswerverifiedShow Answer

Water moves into the guard cells in response to the movement of K+ into the guard cells.

Correct AnswerverifiedShow Answer

Some plants are not photosynthetic and must depend upon bacteria in their root nodules for nutrients.

Correct AnswerverifiedShow Answer

Which force is responsible for moving water up to the tops of the trees?

Correct AnswerverifiedShow Answer

Entry of mineral ions into the xylem is regulated by cells of the cortex.

Correct AnswerverifiedShow Answer

Essential plant nutrients include carbon, potassium, calcium, and nitrogen.

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Stomata closure in darkened environment, at time zero, with air (0.03% CO₂) or CO₂-free airflow through leaf. (Note: A decrease in conductance indicates inactivation of the proton pump.)

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Arrangement of soil particles from large...
View Answer

Correct Answer
verified
Answers may vary slightly but should inc...
View Answer

Correct Answer
verified

The coastal wetlands are losing soil at an alarming rate. In Louisiana, it is estimated that 24 mi² of wetlands are lost each year, which equates to one football field every 38 minutes. Why is the loss of these wetlands so critical?

Correct Answer
verified
The loss of wetlands is a critical issue...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Water moves into the guard cells in response to the movement of K⁺ into the guard cells.

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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