ALGAE, AND, ANIMAL, AQUATIC, BRANCH, CILIATE, CILIOPHORA, DARK, DARK-FIELD, DARKFIELD, FIELD, FRESHWATER, GREEN, IN, LIGHT, LM, MICROBE, MICROBIOLOGY, MICROGRAPH, MICROORGANISM, MICROSCOPIC, MICROSCOPY, ONE-CELLED, ORGANISM, PROTIST, PROTISTA, PROTOZOA, PROTOZOAN, ROTIFER, ROTIFERA, SINGLE-CELLED, STENTOR, TOM, UNICELLULAR,