Question 1

Which one of the following explains what xylem loading is?

Accepted Answer

A)   when the xylem is filled with sugars
B)   right after the xylem is filled with minerals
C)   when the xylem is filled with water
D)   xylem loading never occurs
E)   phloem has given up its water to the xylemF) All of the above
G) B) and D) C

Question 2

Which of the following are features of guard cells that enable them to function?

Accepted Answer

A)   thick inner walls
B)   chloroplasts
C)   cellulose microfibrils
D)   their shape
E)   All of these are trueF) A) and B)
G) A) and C)

Question 3

Phloem loading is a primary example of how ________ processes occur in plant tissues.

Accepted Answer

A)   apoplastic
B)   plasmodesmatal plugging
C)   bulk flow upward
D)   symplastic
E)   sugar transport without membranesF) All of the above
G) A) and B)

Question 4

One use of knowledge of relative water content (RWC)  would be to develop plants for:

Accepted Answer

A)   tolerance of water stress
B)   salt tolerance
C)   heat tolerance
D)   shock tolerance
E)   mineral toleranceF) A) and E)
G) A) and D)

Question 5

If scientists want to develop plants better adapted to certain climates they need information about the plant's ability to:

Accepted Answer

A)   bind membrane proteins
B)   transport solutes passively
C)   make dehydrins
D)   take up minerals
E)   transport calciumF) C) and D)
G) A) and B)

Question 6

Knowledge of halophyte plant functions have given scientists clues for developing agricultural plants that might survive in environments that are:

Accepted Answer

A)   extremely wet
B)   high pressure areas such as mountains
C)   high in toxic wastes
D)   extremely cold
E)   aridF) A) and E)
G) C) and D) E

Question 7

If your plants are wilted, this is an indication that the turgor pressure in cells of that plant are low.

Accepted Answer

A) True 
 B)False  True

Question 8

Measurement of relative water content (RWC)  can be used to predict a:

Accepted Answer

A)   plant's ability to recover from cell collapsing
B)   wilted condition
C)   need for fertilizers
D)   cold shock
E)   salt toleranceF) All of the above
G) A) and C)

Question 9

Water potential is especially important when considering the plant's need for:

Accepted Answer

A)   fertilizers
B)   vitamins
C)   water
D)   osmotic adjustment
E)   dissolved solutesF) C) and E)
G) B) and C)

Question 10

One application of the knowledge of sugar flow in xylem allows for the collecting of sap from maple trees in the:

Accepted Answer

A)   summer
B)   winter
C)   fall
D)   early spring
E)   None of these is correctF) B) and E)
G) All of the above

Question 11

Diffusion of water across membranes occurs through channels formed by proteins known as aquaporins.

Accepted Answer

A) True 
 B)False

Question 12

Which one of the following cell types is found only in flowering plants?

Accepted Answer

A)   vessels
B)   tracheids
C)   parenchyma
D)   sieve tubes
E)   epidermisF) D) and E)
G) B) and E)

Question 13

When plants take up water and minerals these must pass through both a cell wall and a membrane.

Accepted Answer

A) True 
 B)False

Question 14

Scientists developing drought tolerant plants can use the knowledge of relative water content as models for predicting how these plants will respond to stress.

Accepted Answer

A) True 
 B)False

Question 15

One possible explanation for the reason water can be transported up the vessels in plants is because of adhesion of water to the lignified walls.

Accepted Answer

A) True 
 B)False

Question 16

Plants that grow in salt marshes must have a mechanism for coping with potential osmotic stress in their cells.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following is NOT associated with leaf abscission?

Accepted Answer

A)   development of suberin impregnated cork cells
B)   cell wall development
C)   development of a separation layer
D)   water stress
E)   deciduous treesF) B) and E)
G) B) and C)

Question 18

Given the same driving force, water transport in vessels is more rapid than that in tracheids because of the end wall perforation of vessels.

Accepted Answer

A) True 
 B)False

Question 19

One possible reason for the lack of a nucleus in sieve-tube cells may be that the nucleus would:

Accepted Answer

A)   impede bulk flow
B)   cause the cell to die
C)   pass through the plasmodesmata and disrupt bulk flow
D)   cause the cell plate not to form
E)   interfere with bulk flow in the xylemF) A) and D)
G) B) and E)

Question 20

Which one of the following is NOT associated with phloem tissues?

Accepted Answer

A)   sieve tubes
B)   companion cells
C)   tracheids
D)   parenchyma cells
E)   plasmodesmataF) B) and D)
G) All of the above

Exam 38: Flowering Plants: Transport

Which one of the following explains what xylem loading is?

Correct AnswerverifiedC

Which of the following are features of guard cells that enable them to function?

Correct AnswerverifiedShow Answer

Phloem loading is a primary example of how ________ processes occur in plant tissues.

Correct AnswerverifiedShow Answer

One use of knowledge of relative water content (RWC) would be to develop plants for:

Correct AnswerverifiedShow Answer

If scientists want to develop plants better adapted to certain climates they need information about the plant's ability to:

Correct AnswerverifiedShow Answer

Knowledge of halophyte plant functions have given scientists clues for developing agricultural plants that might survive in environments that are:

Correct AnswerverifiedE

If your plants are wilted, this is an indication that the turgor pressure in cells of that plant are low.

Correct AnswerverifiedTrue

Measurement of relative water content (RWC) can be used to predict a:

Correct AnswerverifiedShow Answer

Water potential is especially important when considering the plant's need for:

Correct AnswerverifiedShow Answer

One application of the knowledge of sugar flow in xylem allows for the collecting of sap from maple trees in the:

Correct AnswerverifiedShow Answer

Diffusion of water across membranes occurs through channels formed by proteins known as aquaporins.

Correct AnswerverifiedShow Answer

Which one of the following cell types is found only in flowering plants?

Correct AnswerverifiedShow Answer

When plants take up water and minerals these must pass through both a cell wall and a membrane.

Correct AnswerverifiedShow Answer

Scientists developing drought tolerant plants can use the knowledge of relative water content as models for predicting how these plants will respond to stress.

Correct AnswerverifiedShow Answer

One possible explanation for the reason water can be transported up the vessels in plants is because of adhesion of water to the lignified walls.

Correct AnswerverifiedShow Answer

Plants that grow in salt marshes must have a mechanism for coping with potential osmotic stress in their cells.

Correct AnswerverifiedShow Answer

Which of the following is NOT associated with leaf abscission?

Correct AnswerverifiedShow Answer

Given the same driving force, water transport in vessels is more rapid than that in tracheids because of the end wall perforation of vessels.

Correct AnswerverifiedShow Answer

One possible reason for the lack of a nucleus in sieve-tube cells may be that the nucleus would:

Correct AnswerverifiedShow Answer

Which one of the following is NOT associated with phloem tissues?

Correct AnswerverifiedShow Answer

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True

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