Biology, 02.04.2020 20:05 InvictusPain4777

Photosynthetic protists include phytoplankton, red algae, and brown algae. What is the key role of these protists in aquatic environments?

A. They form the base of the aquatic food web.
B. They help larger organisms digest food.
C. They remove excess sodium from water.
D. They consume cyanobacteria.

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