Unicellular organism: Difference between revisions

Latest revision as of 17:05, 27 May 2012

A unicellular organism or single-celled organism (or single-cell organism) is an organism that comprises only one cell.

They are contrasted with multicellular organisms.

All prokaryotes are unicellular organisms. Prokaryotes include all organisms in the domains archaea and bacteria.
Among eukaryotes (i.e., the eukarya domain), there are some unicellular organisms and some multicellular organisms. Specifically, the protists and unicellular, whereas plants, animals, and fungi are multicellular.

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	* All [[prokaryote]]s are unicellular organisms. Prokaryotes include all organisms in the domains [[archaea]] and [[bacteria]].		* All [[prokaryote]]s are unicellular organisms. Prokaryotes include all organisms in the domains [[archaea]] and [[bacteria]].
	* Among [[eukaryote]]s (i.e., the eukarya domain), there are some unicellular organisms and some multicellular organisms.		* Among [[eukaryote]]s (i.e., the eukarya domain), there are some unicellular organisms and some multicellular organisms. Specifically, the [[protist]]s and unicellular, whereas [[plant]]s, [[animal]]s, and [[fungi]] are multicellular.