News tagged with living organisms
Engineered stem cells seek out, kill HIV in living organisms
(Medical Xpress) -- Expanding on previous research providing proof-of-principal that human stem cells can be genetically engineered into HIV-fighting cells, a team of UCLA researchers have now demonstrated ...
HIV & AIDS
Apr 12, 2012 |
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Researchers engineer blood stem cells to fight melanoma
Researchers from UCLA's cancer and stem cell centers have demonstrated for the first time that blood stem cells can be engineered to create cancer-killing T-cells that seek out and attack a human melanoma. The researchers ...
Cancer
Nov 28, 2011 |
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Malaria parasite protein identified as potential new target for drug treatment
Scientists have discovered how a protein within the malaria parasite is essential to its survival as it develops inside a mosquito. They believe their findings identify this protein as a potential new target for drug treatments ...
Medical research
Apr 25, 2013 |
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No proof China's H7N9 spreading between humans, WHO says
The World Health Organisation said Monday there is no evidence China's new H7N9 strain of bird flu is spreading between humans, as the death toll rose to seven and airline and tourism shares slumped.
Diseases, Conditions, Syndromes
Apr 08, 2013 |
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Surprising findings in mitochondrial biology change long-standing ideas on the protein MTERF1
New findings in mitochondrial biology thoroughly change the idea scientists had for 20 years on the role and importance of the protein MTERF1. For the first time, Max Planck researcher Mügen Terzioglu and her colleagues ...
Medical research
Apr 02, 2013 |
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New lung cancer study takes page from Google's playbook
A new study shows that the same sort of mathematical model that Google uses to predict which websites people want to visit may help researchers predict how lung cancer spreads through the human body.
Cancer
Mar 25, 2013 |
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More than 3,000 epigenetic switches control daily liver cycles
(Medical Xpress)—When it's dark, and we start to fall asleep, most of us think we're tired because our bodies need rest. Yet circadian rhythms affect our bodies not just on a global scale, but at the level ...
Genetics
Dec 11, 2012 |
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How our nerves regulate insulin secretion
Researchers at Karolinska Institutet in Sweden have managed to graft beta cells into the eyes of mice in order to study them in a living organism over a prolonged period of time. As a result, the group and a team of colleagues ...
Medical research
Dec 10, 2012 |
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Genetically-engineered preclinical models predict pharmacodynamic response
New cancer drugs must be thoroughly tested in preclinical models, often in mice, before they can be offered to cancer patients for the first time in phase I clinical trials. Key components of this process include pharmacokinetic ...
Cancer
Sep 19, 2012 |
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Single-port kidney removal through the belly button boosts living-donor satisfaction
In the largest study of its kind, living donors who had a kidney removed through a single port in the navel report higher satisfaction in several key categories, compared to donors who underwent traditional multiple-port ...
Surgery
Sep 12, 2012 |
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Finding brings scientists one step closer to Parkinson's drug
Van Andel Institute announces that researchers at Lund University in Sweden have published a study detailing how Parkinson's disease spreads through the brain. Experiments in rat models uncover a process previously used to ...
Parkinson's & Movement disorders
Jun 27, 2012 |
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Socioeconomics may affect toddlers' exposure to flame retardants
A Duke University-led study of North Carolina toddlers suggests that exposure to potentially toxic flame-retardant chemicals may be higher in nonwhite toddlers than in white toddlers.
Health
May 23, 2012 |
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Molecular probes identify changes in fibronectin that may lead to disease
Fibronectin plays a major role in wound healing and embryonic development. The protein, which is located in the extracellular matrix of cells, has also been linked to pathological conditions including cancer ...
Medical research
Apr 24, 2012 |
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New yeast prion helps cells survive
One of the greatest mysterious in cellular biology has been given a new twist thanks to findings reported in Science. Researchers at the RIKEN Brain Science Institute show that prions, proteins that transm ...
Medical research
Apr 23, 2012 |
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New study unravels mystery of a DNA repair process
(Medical Xpress) -- Scientists at the University of Sussex have uncovered the mechanism of a key process in DNA repair that helps prevent neurodegenerative diseases such as ataxia.
Medical research
Mar 14, 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.
