SAT Subject Biology Practice Question 258: Answer and Explanation
8. The diagram depicts the movement of an amoeba. Which cellular structure is responsible for the amoeba's movement?
C. Cell wall
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.