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Protozoa

Protozoa, formerly, the name of an animal phylum comprising a large, diverse assortment of microscopic or near-microscopic one-celled heterotrophic organisms ( protozoans ). The term protozoan (or the collective plural protozoa ) continues to be used informally the organisms are now more commonly placed in any of five phyla in the kingdom Protista .

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

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