In biology, an organism is any living thing (such as animal, plant, fungus, or micro-organism). In at least some form, all organisms are capable of response to stimuli, reproduction, growth and development, and maintenance of homeostasis as a stable whole. An organism may either be unicellular (single-celled) or be composed of, as in humans, many billions of cells grouped into specialized tissues and organs. The term multicellular (many-celled) describes any organism made up of more than one cell.
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Organism of the month Jan 2009 - the Influenza virus ... Evidence of a Global Super Organism — 1 comment ... How We Can Describe Langston's Ant As An Organism ...en.wordpress.com/tag/organism/New Scientist Short Sharp Science Blog: The world's oldest organism ...
A science news blog from. Thursday, April 17, 2008. The world's oldest organism ... The biggest organism in the world, a fungus in Oregon, is also pretty old: ...www.newscientist.com/blog/shortsharpscience/2008/04/worlds-o...teamseagrass: Seagrasses on the Catalogue of Organisms blog
... rest of the Catalogue of Organisms blog with lots of fascinating entries about ... his blog on the Nature Blog Network: "The Catalogue of Organisms looks at ...teamseagrass.blogspot.com/2009/03/seagrasses-on-catalogue-of...Organisms — Blogs, Pictures, and more on WordPress
Blogs about: Organisms. Featured Blog. While searching for the ... Tags: blog filler, armorgames, Games, Game, Armor, Timewaster, phage wars, Cells, ...en.wordpress.com/tag/organisms/Etiketten: living organism - Blog van Foppe Hemminga
Blog van Foppe Hemminga. Waar de draak in de staart van Joris bijt. Etiketten: living organism ... Blog Tutorials. Playing with jQuery. Testing dp. ...www.blog.hemminga.net/?tag=living+organism&posts=10In biology, an organism is any living thing (such as animal, plant, fungus, or micro-organism). In at least some form, all organisms are capable of response to stimuli, reproduction, growth and development, and maintenance of homeostasis as a stable whole. An organism may either be unicellular (single-celled) or be composed of, as in humans, many billions of cells grouped into specialized tissues and organs. The term multicellular (many-celled) describes any organism made up of more than one cell.
The terms "organism" (Greek ὀργανισμός - organismos, from Ancient Greek ὄργανον - organon "organ, instrument, tool") first appeared in the English language in 1701 and took on its current definition by 1834 (Oxford English Dictionary).
Scientific classification in biology considers organisms synonymous with life on Earth. Based on cell type, organisms may be divided into the prokaryotic and eukaryotic groups. The prokaryotes represent two separate domains, the Bacteria and Archaea. Eukaryotic organisms, with a membrane-bounded cell nucleus, also contain organelles, namely mitochondria and (in plants) plastids, generally considered to be derived from endosymbiotic bacteria.T.Cavalier-Smith (1987) The origin of eukaryote and archaebacterial cells, Annals of the New York Academy of Sciences 503, 17–54 Fungi, animals and plants are examples of species that are eukaryotes.
More recently a clade, Neomura, has been proposed, which groups together the Archaea and Eukarya. Neomura is tought to have evolved from Bacteria, more specifically from Actinobacteria.T. Cavalier-Smith (2002) The neomuran origin of archaebacteria, the negibacterial root of the universal tree and bacterial megaclassification. International Journal of Systematic and Evolutionary Microbiology 52, 7–76
Semantics
The word "organism" may broadly be defined as an assembly of molecules that function as a more or less stable whole and has the properties of life. However, many sources propose definitions that exclude viruses and theoretically-possible man-made non-organic life forms. Viruses are dependent on the biochemical machinery of a host cell for reproduction.
Chambers Online Reference provides a broad definition: "any living structure, such as a plant, animal, fungus or bacterium, capable of growth and reproduction" .
In multicellular life the word "organism" usually describes the whole hierarchical assemblage of systems (for example circulatory, digestive, or reproductive) themselves collections of organs; these are, in turn, collections of tissues, which are themselves made of cells. In some plants and the nematode Caenorhabditis elegans, individual cells are totipotent.

























