Unicellular organism: Difference between revisions

Revision as of 23:47, 3 January 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.

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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, 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.