protozoa division collection as single cell eukaryote biological outline set

protozoa biology microbiology anatomy zoology microbe microscopic organism cell microorganism primitive vector illustration medicine animal diagram bacterium collection magnification outline nature set group type micro laboratory ecology primary single study cellular scheme paramecium didinium euglena difflugia stentor trypanasoma carchesium amoeba unicellular germ microscopy isolated various visual structure eukaryote algae