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Body size is a heritable trait in the amphipod, and aquatic crustacean. fish preferentially consume large amphipods, leaving primarily small amphipods to breed. based on these observations, how would we expect evolution to affect ponds with and without fish?

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meerkat18

Since fish feeds primarily on large amphipod, therefore what we expect to remain to evolve on ponds containing fish would be smaller amphipod or crustacean. Then correct answer to this question would be:

“Ponds with fish should have smaller amphipods.”

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