News tagged with organisms

Related topics: cells · protein · bacteria · genes · mutations

Mapping the Danes' kitchen skills

Last year, researchers from Aarhus BSS, Aarhus University developed a so-called quality index, a tool applied when mapping the factors that matter in Danish people's perception of food quality. This year, the tool has been ...

Feb 08, 2016
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Uncovering cardiovascular disease genetics

February is American Heart Month, a great time to take a closer look at cardiovascular disease (CVD). According to the World Health Organization (WHO), about 17.5 million people die each year from CVD, a figure representing ...

Feb 08, 2016
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The enduring need for cancer treatment

Danielle Rodin is a Radiation Oncology Resident at the University of Toronto and co-founded the group GlobalRT, which is a group of young professionals dedicated to improving the availability and accessibility of radiation ...

Feb 05, 2016
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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.

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

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