Question 1

Capillary action relies on what property of water?

Accepted Answer

A)  Adhesion 
B)  Cohesion 
C)  Hydrophobicity 
D)  Small size 
E)  Bond angle 
A)  Adhesion 
B)  Cohesion 
C)  Hydrophobicity 
D)  Small size 
E)  Bond angle

Question 2

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

Question 3

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. 
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.

Question 4

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. 
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.

Question 5

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. 
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.

Question 6

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

Question 7

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. 
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.

Question 8

Plasmodesmata are important in _______ pathways of movement.

Accepted Answer

A)  symplastic xylem 
B)  apoplastic xylem 
C)  all xylem 
D)  root hair 
E)  phloem 
A)  symplastic xylem 
B)  apoplastic xylem 
C)  all xylem 
D)  root hair 
E)  phloem

Exam 34: Transport in Plants

Capillary action relies on what property of water?

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?

Aphids can be useful in terms of helping scientists assess

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

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?

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

Establishing a H+ concentration gradient across the cell membrane

Plasmodesmata are important in _______ pathways of movement.

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Establishing a H⁺ concentration gradient across the cell membrane