bacteria or protozoa seen under a microscope. microscopic unicellular organism

bacteria protozoa microscope microscopic unicellular organism viruses fungi algae nematodes actinomycetes biology science microbiology research biological set biology protozoa cell protista unicellular bacteria microbiology microscope organism microbe virus chloroplast water nature education green science laboratory nresearch ecology pond microorganism macro amoeba protist paramecium flagellate chlamydomonas spirogyra protozoan structure micro euglena collection set algae microscopic chlorella fungi nematodes actinomycetes abstract pathogen health medical medicine infection collage bacterium