Diatoms are
A) found only in freshwater.
B) more closely related to slime molds than to algae.
C) usually morphologically symmetric.
D) multicellular phototrophs.

Question

Quizplus · Accepted Answer

Diatoms are typically morphologically symmetric, with two halves that fit together like a petri dish or pillbox.

Answer: D
 Diatoms are single-celled algae that use photosynthesis to produce energy. They are not multicellular, and they can be found in both freshwater and marine environments.

Diatoms Are