Question 1

Water potential, or the tendency of a solution to take up water from pure water (i.e., water with no solutes)  is determined by both solute potential and pressure potential.Which of the following is true regarding the relationship between solute potential and pressure potential?

Accepted Answer

A)   As solute potential increases, pressure potential also necessarily increases.
B)   Pressure potential has little effect on water potential.
C)   Water potential can be calculated by dividing solute potential by pressure potential.
D)   Solute potential and pressure potential can vary independent of each other.
E)   Water potential is ultimately determined more by solute potential than by pressure potential.F) C) and E)
G) B) and E)

Question 2

As water is transported through the xylem, the force of cohesion

Accepted Answer

A)   acts mainly in the leaves.
B)   acts throughout the column of water.
C)   acts to draw water into the roots.
D)   decreases over the length of the water column.
E)   is replaced by tension in the xylem.F) A) and B)
G) B) and D)

Question 3

Plasmodesmata are important in _______ pathways of movement.

Accepted Answer

A)   symplastic xylem
B)   apoplastic xylem
C)   all xylem
D)   root hair
E)   phloemF) D) and E)
G) C) and D)

Question 4

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) A) and D)
G) A) and E)

Question 5

Establishing a H+ concentration gradient across the cell membrane

Accepted Answer

A)   enables K+ ions to enter the cell via active transport.
B)   prevents Cl+ ions from entering the cell.
C)   enables certain cations to enter the cell moving against their concentration gradient.
D)   facilitates the flow of water into the cell.
E)   is important for reducing the acidity level within the cells.F) B) and E)
G) A) and B)

Question 6

Aphids can be useful in terms of helping scientists assess

Accepted Answer

A)   the direction of the flow of phloem.
B)   the pressure within the xylem.
C)   the solute content of the phloem.
D)   detecting companion cells.
E)   transpiration levels.F) C) and E)
G) A) and C)

Question 7

Capillary action relies on what property of water?

Accepted Answer

A)   Adhesion
B)   Cohesion
C)   Hydrophobicity
D)   Small size
E)   Bond angleF) None of the above
G) C) and D)

Question 8

If you know that a cell has a negative solute potential and yet there is no net movement of water either into or out of the cell (assuming that the cell is immersed an a pure water bath), what might this tell you about its pressure potential?

Accepted Answer

This should tell you...

Exam 34: Transport in Plants

Plasmodesmata are important in _______ pathways of movement.

Correct Answer
verified

Aphids can be useful in terms of helping scientists assess

Correct Answer
verified

As water is transported through the xylem, the force of cohesion

Correct Answer
verified

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

Correct Answer
verified

Establishing a H⁺ concentration gradient across the cell membrane

Correct Answer
verified

Water potential, or the tendency of a solution to take up water from pure water (i.e., water with no solutes) is determined by both solute potential and pressure potential.Which of the following is true regarding the relationship between solute potential and pressure potential?

Correct Answer
verified

Capillary action relies on what property of water?

Correct Answer
verified

If you know that a cell has a negative solute potential and yet there is no net movement of water either into or out of the cell (assuming that the cell is immersed an a pure water bath), what might this tell you about its pressure potential?

Correct Answer
verified
This should tell you...
View Answer

Exam 34: Transport in Plants

Plasmodesmata are important in _______ pathways of movement.

Correct AnswerverifiedShow Answer

Aphids can be useful in terms of helping scientists assess

Correct AnswerverifiedShow Answer

As water is transported through the xylem, the force of cohesion

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Establishing a H+ concentration gradient across the cell membrane

Correct AnswerverifiedShow Answer

Water potential, or the tendency of a solution to take up water from pure water (i.e., water with no solutes) is determined by both solute potential and pressure potential.Which of the following is true regarding the relationship between solute potential and pressure potential?

Correct AnswerverifiedShow Answer

Capillary action relies on what property of water?

Correct AnswerverifiedShow Answer

If you know that a cell has a negative solute potential and yet there is no net movement of water either into or out of the cell (assuming that the cell is immersed an a pure water bath), what might this tell you about its pressure potential?

Correct AnswerverifiedThis should tell you...View AnswerShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Establishing a H⁺ concentration gradient across the cell membrane

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
This should tell you...
View Answer