Official 54 Lec 1
Question 4 of 6
Why does the professor mention fish that live in freshwater lakes?

A.

To point out that many aquatic species exhibit diel vertical migration

B.

To give an example of a species of fish that feeds on bioluminescent zooplankton

C.

To make a comparison between fish and zooplankton

D.

To support one of the theories explaining why zooplankton migrate

正确答案:D

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