Diatoms are able to form chains to help them float and store oil to reduce their density. While they do have two flagella that provide motility and reduce sinking, that is not necessarily unique to diatoms and is not mentioned in every source as a distinct adaptation of diatoms. Therefore, the best choice is D, as it includes the two adaptations that are most widely recognized as characteristic of diatoms.

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Diatoms Are Able to

Question 72

Multiple Choice

Diatoms are able to

A) form chains to help floating.
B) store oil to reduce their density.
C) produce two flagella that provide motility and reduce sinking.
D) form chains to help floating and store oil to reduce their density.
E) form chains to help floating, store oil to reduce their density, and produce two flagella that provide motility and reduce sinking.

Correct Answer: