Unicellular organism
organism consisting of only one cell / From Wikipedia, the free encyclopedia
Unicellular organisms are organisms that have one cell. They are divided into two quite different types, from different classification kingdoms.
- The prokaryotes, bacteria and archaea, have cells with no nucleus and a simple cell structure.
- Eukaryotes have a nucleus, and a more complex cell structure.
The differences between the prokaryota and eukaryota are significant. Eukaryotes possess a nucleus and various subcellular organs called organelles, and prokaryotes do not.