Prokaryotes are unicellular organisms that lack membrane-bound structures. This article details the structure of prokaryotic cells and provides examples of prokaryotic organisms.

Eukaryotes and prokaryotes Bacteria are amongst the simplest of organisms – they are made of single cells. Their cell structure is simpler than the cells of animals, plants and fungi.

In addition, prokaryotes can move passively by floating and sliding. The bacterial flagellum is the best understood prokaryotic motility structure.