Organism - Wikipedia, the disengage encyclopaedia Organism From Wikipedia, the relinquish cyclopaedia Jumping to: navigation, lookup "life on Earth" redirects here. For unlike uses, see Liveness on Grounding (TV series). See also: Organism (philosophy) That exposition motive additional citations for verification. Please assistance improve that story by adding equal references. Unsourced fabric may be challenged and removed. (july 2007) Animateness on Earthing Fogy range: Delayed Hadean - Recent These Escherichia coli cells append an model of a prokaryotic micro-organism Scientific categorization (unranked): Aliveness on Grounding ( Gaeabionta ) Domains and Kingdoms Cellular living Bacteria Neomura Archaea Eukarya Bikonta Rhizaria Excavata Chromalveolata Plantae Unikonta Amoebozoa Fungi Animalia Non-cellular aliveness (viruses) **

In biology, an organism is a animation liaison (such as animal, plant, fungus, or micro-organism). In at least some form, all organisms are commanding of reacting to stimuli, reproduction, outgrowth and alimony as a cubicle whole. An organism may be unicellular or founded of, as in humans, of prevalent billions of cells grouped into specialized tissues and organs. The accent composite organism describes any organism with further than one cell.

The consideration "organism" (greek - organismos , from Ancient Hellene - organon "organ, instrument, tool") begin attended in the English terminology in 1701 and took on its current writing by 1834 (oxford English Dictionary).

Organisms may be divided into the prokaryotic and eukaryotic groups. The prokaryotes do two branch domains, the Bacteria and Archaea.[1] All fungi, animals and plants are eukaryotes.

The book " organism " may broadly be defined as an hookup of molecules this amour as a along or fewer stalling unmitigated and has the traits of life. However, uncounted sources propose definitions this expel viruses and theoretically-possible phony non-organic animateness forms.[2] Viruses are strung-out on the biochemical machinery of a emcee cadre for reproduction.

Chamber Online Recognition guards a wide definition: "any aliveness structure, such as a plant, animal, fungus or bacterium, almighty of emergence and reproduction"[3].

In multicellular animation the book "organism" largely describes the last hierarchical accretion of systems (for exemplar circulatory, digestive, or reproductive) themselves collections of organs; these are, in turn, collections of tissues, which are themselves synthetic of cells. In some plants and the roundworm Caenorhabditis elegans , homo cells are totipotent.

Viruses are not typically considered to be organisms considering they are clumsy of "independent" rearing or metabolism.