SAT Subject Biology Practice Question 258: Answer and Explanation

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Question: 258

8. The diagram depicts the movement of an amoeba. Which cellular structure is responsible for the amoeba's movement?

A. Cilia
B. Flagella
C. Cell wall
D. Cytoskeleton
E. Cell membrane

Correct Answer: D


The amoeba moves by cytoplasmic streaming, which forms extensions called pseudopods. By extending these "false feet," an amoeba cell achieves locomotion. Streaming is due to the action of the cytoskeleton.

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