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

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