SAT Subject Biology Practice Question 201: Answer and Explanation

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Question: 201

11. What is the most likely role of zooplankton in an aquatic ecosystem?

A. Producer
B. Primary consumer
C. Secondary consumer
D. Tertiary consumer
E. Decomposer

Correct Answer: B

Explanation:

Zooplankton are minuscule organisms that feed on algae or phytoplankton. While some zooplankton organisms feed on other zooplankton, the most common role for zooplankton is primary consumption.

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