News tagged with organisms
Mars methane linked to meteorites
Tiny amounts of methane in the Martian atmosphere may come not from living things, but from meteorites on the red planet's surface, the latest findings suggest.
Space & Earth / Space Exploration
May 31, 2012 |
4.7 / 5 (3) |
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The first chemical circuit developed
Klas Tybrandt, doctoral student in organic electronics at Linkoping University, Sweden, has developed an integrated chemical chip. The results have just been published in Nature Communications.
May 29, 2012 |
4.6 / 5 (10) |
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Scientists map and sequence genome of switchgrass relative foxtail millet
A newly published genetic sequence and map of foxtail millet, a close relative of switchgrass and an important food crop in Asia, is giving scientists working to increase biofuel and crop yields a powerful new tool.
Jun 01, 2012 |
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Trapped dental 'calculus' holds clues to ancient human diets and health
Many ancient human teeth, including specimens tens of thousands of years old, still hold onto tiny pieces of food -- and even bacteria. Anthropologists are studying the tartar attached to ancient human teeth ...
Other Sciences / Archaeology & Fossils
May 31, 2012 |
4 / 5 (2) |
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Turning DNA into a hard drive
Silicon-based computers are fine for typing term papers and surfing the Web, but scientists want to make devices that can work on a far smaller scale, recording data within individual cells. One way to do that is to create ...
Jun 01, 2012 |
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Silkmoth inspires novel explosive detector
Imitating the antennas of the silkmoth, Bombyx mori, to design a system for detecting explosives with unparalleled performance is the feat achieved by a French research team. Made up of a silicon microcantilever ...
Chemistry / Analytical Chemistry
Jun 01, 2012 |
5 / 5 (5) |
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Got nectar? To hawkmoths, humidity is a cue
(Phys.org) -- Humidity emanating from a flower's nectar stores tells a moth if the flower is worth a visit, research led by a UA entomologist has discovered.
May 30, 2012 |
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Expedition studies acid impacts on Arctic
The effects of ocean acidification on Arctic seas will be studied by a team of 30 researchers, including Dr Toby Tyrrell from the University of Southampton, who set sail from the UK today (1 June), venturing ...
Jun 01, 2012 |
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Researchers demonstrate possible primitive mechanism of chemical info self-replication
(Phys.org) -- When scientists think about the replication of information in chemistry, they usually have in mind something akin to what happens in living organisms when DNA gets copied: a double-stranded molecule ...
May 25, 2012 |
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Efficient preparation of a set of potential glycosidase inhibitors
(Phys.org) -- In many biological and pathological processes, glycosidase enzymes attack glycosidic bonds in carbohydrates, glycoproteins, and glycolipids. The ability to modify or block these processes by ...
May 29, 2012 |
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Cartel web presence could be used against them: experts
Experts from 20 countries gathered Wednesday at the Mexican resort town of Cancun to discuss a strategy for battling organized crime, in an effort mandated by the recent Summit of the Americas.
May 31, 2012 |
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Organic carbon from Mars, but not biological
(Phys.org) -- Molecules containing large chains of carbon and hydrogen--the building blocks of all life on Earth--have been the targets of missions to Mars from Viking to the present day. While these molecules ...
Space & Earth / Space Exploration
May 24, 2012 |
4.4 / 5 (5) |
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New release of Web-based resource resolves confusion over plant names
A rose by any other name would smell as sweet -- but it might confound scientists interested in understanding the chemical components of its fragrance or discovering where its ancestors grew in the wild.
Jun 01, 2012 |
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The environment and pharmaceuticals and personal care products: What are the big questions?
Researchers at the University of York headed a major international review aimed at enhancing efforts to better understand the impacts of chemicals used in pharmaceuticals or in personal care products, such as cosmetics, soaps, ...
May 30, 2012 |
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New study finds titan cells protect Cryptococcus
Giant cells called "titan cells" protect the fungus Cryptococcus neoformans during infection, according to two University of Minnesota researchers. Kirsten Nielsen, Ph.D., an assistant professor in the department of microb ...
May 28, 2012 |
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Organism
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.
For more information about Organism, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
