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#protist #amoeba #protozoa #unicellular organism #aquatic microbe #single-celled

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#phytoplankton #microalgae #plankton #aquatic microbe #single-celled algae #marine algae #freshwater algae

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#euglena #freshwater #pond life #aquatic microbe #protist #phytoplankton #single-cell #photosynthesis