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

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