protozoa paramecium caudatum, amoeba proteus, chlamydomonas, euglena viridis, green algae chlorella, spirogyra

algae amoeba animal background biology caudatum cell celled chaos chlamydomonas chlorella chloroplast diffluens education euglena eukaryotic flagellate glass green illustration isolated magnification magnifier magnify magnifying micro microbiology microorganism microscopic organism paramecium proteus protist protista protistm protozoa protozoan reinhardtii science scientific search set single spirogyra structure study unicellular vector viridis white