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'''Archaea''' is one of the three [[Domain (biology)|domains]] of life (the other two being [[prokaryote|prokaryotes]] and [[eukaryote|eukarya]]).  It comprises single-celled organisms, similar in size and shape to prokaryotes, that, like prokaryotes, lack internally compartmentalized [[organelles]].  It was established as a separate domain from prokaryotes after biochemical and genetic studies revealed that archaeans formed a genetically distinct group with distinctive biochemistry (notably in the lipid composition of their cell membranes) and metabolic pathways.

'''Archaea''' is one of the three [[Domain (biology)|domains]] of life (the other two being [[bacteria]] and [[eukaryote|eukarya]]).  Together with bacteria, it is one of the two [[prokaryote|prokaryotic]] domains of life; meaning that they lack discrete membrane-bound organelles.  It was established as a separate domain from bacteria after biochemical and genetic studies revealed that archaeans formed a genetically distinct group with distinctive biochemistry (notably in the lipid composition of their cell membranes) and metabolic pathways.<ref>http://www.ucmp.berkeley.edu/archaea/archaea.html</ref>

 

 

 

[[Category:Microbiology]]

[[Category:Microbiology]]