When guard cells are filled with water,
A) stomata are open.
B) stomata are closed.
C) sugars diffuse into the sieve tube members.
D) gases cannot diffuse into or out of the plant.
E) more than one of these take place.

Question

Quizplus · Accepted Answer

When guard cells are filled with water, they become turgid and swell. This causes them to bulge and the stomata between them to open. This allows for gas exchange between the plant and the environment. Therefore, when guard cells are filled with water, stomata are open.

When Guard Cells Are Filled with Water