A research team from Kiel University describes an unknown defense mechanism in bacteria that selectively wards off foreign and potentially harmful genetic information.
Cell & Microbiology
Mar 8, 2023
0
120
There are reasons to assume that not only humans but also some non-human species of animal have conscious perception. Which species have consciousness and how the subjective experience of various species could differ is being ...
Plants & Animals
Mar 2, 2023
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46
The body pigmentation of an organism is caused by coloring substances and structures that are found in the cells of skin, hair, feathers, or scales, for example. This pigmentation considerably limits investigations of important ...
Cell & Microbiology
Mar 17, 2023
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23
Scientists from Skoltech and other research centers have systematically studied the toxicity of materials used in perovskite solar cells. They conclude that, once the remaining technological hurdles are overcome, mass production ...
Biochemistry
Feb 28, 2023
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28
Development of new drugs to effectively target the bacterium that causes tuberculosis (TB) could be one step closer following an important discovery from the University of Surrey.
Cell & Microbiology
Mar 27, 2023
0
8
Life may come in all shapes and sizes, but in nature the most extreme size ranges predominate, according to Rutgers researchers.
Plants & Animals
2 hours ago
0
4
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.
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