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Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?

1. Fish
2. Zooplankton
3. Frog
4. Phytoplankton

Correct answer: Fish

Solution

Fish can occupy more than one trophic level because different fish species, and even the same species at different life stages, may feed on zooplankton, insects, or smaller fish. That places them at multiple positions in the pond food web.

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