The first fish that eats upon the planktonic forms is:
Correct answer: D. Secondary consumer
- A. Primary consumer
- B. Carnivore
- C. Decomposer
- D. Secondary consumer
Explanation
In the usual aquatic food chain, phytoplankton are eaten by zooplankton, and the first fish eats these planktonic animals; it therefore acts as a secondary consumer. It is not a primary consumer unless it feeds directly on phytoplankton.
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