tiny organisms
- microbesMicroscopic living organisms
- bacteriaNucleus-free single-celled organisms
- germsMicroscopic disease agents
- amoebaShape-shifting single-celled organism
- planktonDrifting marine microlife
cells · viruses · fungi · spores · algae · protozoa · microscopic · petri dish · culture · colony · single-celled · parasites · yeast · mold · invisible · swarming · teeming · pond water
size
tiny organismsmegafauna
Species over 44 kilograms
whales · elephants · blue whale · dinosaurs · giant squid
complexity
tiny organismsvertebrates
Animals with internal skeletons
mammals · sentient beings · intelligent life · humans · primates