By Jack Tamisiea For a creature made up of only a single cell, the stentor is a giant. This trumpet-shaped organism is among the largest unicellular organisms, stretching as long as a sharpened ...

Lacrymaria olor is a single-celled organism, or protist ... swan", after its swan-like neck and tear-shaped body. Read more Largest ever animal may have been Triassic ichthyosaur super-predator ...

Like bacteria, archaea are single-celled organisms. Genetically, however, there are significant differences between the two domains, especially regarding their cell envelopes and metabolic processes.