Protozoa lack cell walls and are eukaryotic heterotrophic microorganisms. They include ciliates, kinetoplastids, and sarcodina. Many protozoa live as parasites within other animals. Slime molds are unusual microorganisms that resemble protozoa at some phases of their life cycles and fungi at other phases. The two groups of slime molds, cellular and acellular, are not closely related.
Slime molds live in damp soils and decaying plant material.
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