SAT Subject Biology Practice Question 49: Answer and Explanation

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Question: 49

3. Which of these is/are responsible for an increase in the thickness of a plant?

I. Apical meristem

II. Vascular cambium

III. Cork cambium

A. I only
B. II only
C. III only
D. I and II
E. II and III

Correct Answer: E


The vascular cambium and the cork cambium are forms of lateral meristem, which increase the thickness (secondary growth) of woody plants. The apical meristem increases the length of a plant (primary growth) only.

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