News tagged with living organisms

Related topics: enzyme · cells · protein · amino acids

Fluorescent material reveals how cells grow

Fibre from a semiconducting polymer, developed for solar cells, is an excellent support material for the growth of new human tissue. Researchers at Linköping University have shown that the fibre glows, which makes it possible ...

Jul 21, 2015
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Copper on the brain

(Medical Xpress)—The value of copper has risen dramatically in the 21st century as many a thief can tell you, but in addition to the thermal and electrical properties that make it such a hot commodity metal, copper has ...

May 27, 2013
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Fighting cancer with microgravity research

( —For lab-coated cancer biologists, peering through microscopes at stained tissue samples under fluorescent lights, the International Space Station may be the last thing that comes to mind. But 40 years of microgravity ...

Jun 25, 2013
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In biology, an organism is any living system (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. 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 thought to have evolved from Bacteria, more specifically from Actinobacteria.

This text uses material from Wikipedia, licensed under CC BY-SA

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