Question 1

Match each term or phrase with the letter of the associated plant tissue. Each letter may be used once, more than once, or not at all.
-stomata

Accepted Answer

A) xylem 
B) phloem 
C) both xylem and phloem 
D) neither xylem nor phloem

Question 2

What is the general term for long-distance transport of substances in plants?

Accepted Answer

A) osmosis 
B) translocation 
C) pressure flow 
D) cohesion-tension

Question 3

Match each term or phrase with the letter of the associated plant tissue. Each letter may be used once, more than once, or not at all.
-dead cells throughout conducting portions

Accepted Answer

A) xylem 
B) phloem 
C) both xylem and phloem 
D) neither xylem nor phloem

Question 4

What route is being followed by water that moves through nonliving regions of a root, such as air spaces in root tissue?

Accepted Answer

A) the apoplastic, transmembrane, and epidermal pathways 
B) the symplastic, transmembrane, and transepidermal pathways 
C) the transmembrane, epidermal, and transepidermal pathways 
D) the apoplastic, transmembrane, and symplastic pathways

Question 5

Match each term or phrase with the letter of the associated plant tissue. Each letter may be used once, more than once, or not at all.
-primary transport of ions from leaves

Accepted Answer

A) xylem 
B) phloem 
C) both xylem and phloem 
D) neither xylem nor phloem

Question 6

Explain the processes of phloem loading and unloading in a flowering plant.

Accepted Answer

The answer of Explain the processes of phloem loading and...

Question 7

Match each term or phrase with the letter of the associated plant tissue. Each letter may be used once, more than once, or not at all.
-transport of sugars

Accepted Answer

A) xylem 
B) phloem 
C) both xylem and phloem 
D) neither xylem nor phloem

Question 8

Which term best describes the structure that is necessary for facilitated diffusion?

Accepted Answer

A) a receptor protein 
B) a pore 
C) a signal protein 
D) a carrier protein

Question 9

What is the evaporation of water from plant tissues called?

Accepted Answer

A) guttation 
B) root pressure 
C) transpiration 
D) cohesion-tension

Question 10

What is the most widely accepted and supported model for explaining the movement of phloem sap in flowering plants?

Accepted Answer

A) the translocation mechanism 
B) the pressure-flow mechanism 
C) the transpiration mechanism 
D) the cohesion-tension mechanism

Question 11

Which ion plays the most prominent role in the opening and closing of stomata?

Accepted Answer

A) Cl- 
B) K+ 
C) Na+ 
D) Ca2+

Question 12

Which ion is pumped out of guard cells in order to increase their turgidity?

Accepted Answer

A) H+ 
B) Ca2+ 
C) Na+ 
D) K+

Question 13

What route is being followed by water that moves through living cells in a root?

Accepted Answer

A) the symplastic and epidermal pathways 
B) the transmembrane and apoplastic pathways 
C) the transmembrane and symplastic pathways 
D) the apoplastic and epidermal pathways

Question 14

How would an air temperature rise of 10°C typically affect evaporation from leaves?

Accepted Answer

A) It would mostly eliminate evaporation. 
B) It would double the rate of evaporation. 
C) It would triple the rate of evaporation. 
D) It would quadruple the rate of evaporation.

Question 15

What is the water potential of phloem relative to the water potential of the surrounding xylem?

Accepted Answer

A) lower 
B) higher 
C) about the same 
D) exactly the same

Question 16

Which of the following are found on either side of a plant stoma?

Accepted Answer

A) guard cells 
B) trichomes 
C) leaves 
D) root hairs

Question 17

What is the principal driving force for guttation?

Accepted Answer

A) pumping by the xylem cells 
B) sunlight 
C) passive transport 
D) root pressure

Question 18

Consider a living plant cell in a living leaf that has higher water potential than the fluids surrounding the cell. What would happen to the water?

Accepted Answer

A) There would be no net flow of water into or out of the cell. 
B) There would be a gain of water by the cell only if the cell's pressure potential is low enough. 
C) There would be a net flow of water out of the cell. 
D) There would be a gain of water by the cell only if the cell's pressure potential is high enough.

Question 19

Suppose a living plant cell has ψP = 0.4 MPa and ψS = -0.5 MPa. Suppose also that the plant cell is placed into a beaker filled with a solution for which ψ = ψS = -0.9 MPa. What will the cell then do?

Accepted Answer

A) It will take up water until within the cell ψP = -ψS. 
B) It will lose water until its ψS = its ψP. 
C) It will lose water until its ψ = ψ of the solution. 
D) It will take up water until it bursts.

Question 20

Which term best describes the process by which sucrose is moved into a cell against its concentration gradient while at the same time, protons are moved into a cell with their concentration gradient?

Accepted Answer

A) facilitated diffusion 
B) a symport 
C) an antiport 
D) active transport

Exam 35: Transport in Plants

Match each term or phrase with the letter of the associated plant tissue. Each letter may be used once, more than once, or not at all. -stomata

What is the general term for long-distance transport of substances in plants?

Match each term or phrase with the letter of the associated plant tissue. Each letter may be used once, more than once, or not at all. -dead cells throughout conducting portions

What route is being followed by water that moves through nonliving regions of a root, such as air spaces in root tissue?

Match each term or phrase with the letter of the associated plant tissue. Each letter may be used once, more than once, or not at all. -primary transport of ions from leaves

Explain the processes of phloem loading and unloading in a flowering plant.

Match each term or phrase with the letter of the associated plant tissue. Each letter may be used once, more than once, or not at all. -transport of sugars

Which term best describes the structure that is necessary for facilitated diffusion?

What is the evaporation of water from plant tissues called?

What is the most widely accepted and supported model for explaining the movement of phloem sap in flowering plants?

Which ion plays the most prominent role in the opening and closing of stomata?

Which ion is pumped out of guard cells in order to increase their turgidity?

What route is being followed by water that moves through living cells in a root?

How would an air temperature rise of 10°C typically affect evaporation from leaves?

What is the water potential of phloem relative to the water potential of the surrounding xylem?

Which of the following are found on either side of a plant stoma?

What is the principal driving force for guttation?

Consider a living plant cell in a living leaf that has higher water potential than the fluids surrounding the cell. What would happen to the water?

Suppose a living plant cell has ψ_P = 0.4 MPa and ψ_S = -0.5 MPa. Suppose also that the plant cell is placed into a beaker filled with a solution for which ψ = ψ_S = -0.9 MPa. What will the cell then do?

Which term best describes the process by which sucrose is moved into a cell against its concentration gradient while at the same time, protons are moved into a cell with their concentration gradient?