unicellular organism: protozoan gliding across a droplet, reflecting the simplicity and complexity of primitive life

exploration life parasite science singlecell water biology living study evolution flagellate protist protozoon infection cell bacteria species microbe disease ciliate unicellular protozoan colony zoology research aquatic ecosystem eukaryote microorganism structure amoeba microscope flagella bacterium movement microscopic environment nucleus tiny nature protozoa specimen plankton natural habitat pathogen organism biodiversity ecology ai generated