Question

where did the protozoa appear first

Answer 1

Answer:

Protozoa are ubiquitous (found everywhere); they are present in all aquatic or moist environments, and their cysts can be found in even the most inhospitable parts of the biosphere. Most are free-living and eat bacteria, algae, or other protozoa.

Explanation:

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Answer 2

Answer:

water & moist environment

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