Official 26 Lec 2
Question 4 of 6
According to the professor, what important function do diatoms serve?

A.

They alter cadmium so it is less toxic to humans.

B.

They help cycle zinc in places where it is scarce.

C.

They distribute carbon throughout the ocean.

D.

They remove cadmium from the ocean floor.

正确答案:C

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