pond biotope with microscopic unicellular organisms: protozoa paramecium caudatum, amoeba proteus,

algae amoeba animal background biodiversity biology biotope caudatum cell celled chaos chlamydomonas chlorella chloroplast diffluens ecosystem euglena eukaryotic green illustration inhabitants lake landscape micro microbe microbiology microorganism microscopic nature organism paramecium pond prokaryotic proteus protist protista protistm protozoa protozoan pseudopodia reinhardtii single spirogyra structure unicellular vector viridis water zoology