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In what way are autotrophic protists essential to the survival of aquatic ecosystems?

A. They remove toxins from the water.

B. They produce extensive reefs.

C. They serve as the base of the food chains.

D. They convert nitrogen gas into ammonia.

1 Answer

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In what way are autotrophic protists essential to the survival of aquatic ecosystems? ... Both are examples of mutualism between protists and animals.
User Pzelasko
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