SAT Subject Biology Practice Question 178: Answer and Explanation

Next steps

Question: 178

8. Question below refers to the following leaf diagram.

These cells regulate gas exchange in the leaf.

A.
B.
C.
D.
E.

Correct Answer: E

Explanation:

Pairs of guard cells regulate gas exchange by opening or closing a stoma, or opening, in the leaf. Guard cells close to prevent water loss.

Previous       Next