When a plant is using transpiration to cool off during the day, its stomates are _______ and its water potential is _______ negative than that of the soil. At night, the plant's water potential will be _______ that of the soil (assuming that the soil is receiving sufficient moisture).
A) open; more; roughly the same as
B) open; more; more positive than
C) open; less; roughly the same as
D) closed; less; more positive than

Question

Quizplus · Accepted Answer

During the day, stomates are open for transpiration, making the plant's water potential more negative than the soil. At night, without transpiration, the water potential equilibrates, becoming roughly the same as the soil.

When a Plant Is Using Transpiration to Cool Off During