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Accidental

Adjective 1. Happening unexpectedly or by chance. (biology-online.org) 2. Refers to the occurrences or existence of all those species that would not be found in a particular region under normal circumstances....

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Acclimation

/a-klə-ˈmā-shən, -ˌklī-/ Noun 1. In English-speaking countries other than the US, is the process in which an individual organism adjusting to a gradual change in its environment (such as a change in temperature, humidity, photoperiod, or pH), allowing it to maintain performance across a range of environmental conditions. (wikipedia.org) 2. Adaptation to a new climate (a new temperature or altitude or environment). (biology-online.org) 3. To accustom or become accustomed to a new climate or environment; adapt. (Dictionary.com) 4. The adaptation of an organism to its natural climatic environment. (wiktionary.org) Also called...

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Accommodation

/əˌkäməˈdāSHən/ Noun 1. The process by which the vertebrate eye changes optical power to maintain a clear image (focus) on an object as its distance varies. Accommodation acts like a reflex, but can also be consciously controlled. (wikipedia.org) 2. (Ophthalmology, Physiology) Adjustment, especially that of the eye for various distances resulting in pupil constriction or dilatation. (biology-online.org) 3. The automatic adjustment of the focus of the eye by flattening or thickening of the lens. (Google dictionary) Word origin: From Latin accommodātiō (“adjustment, accommodation, compliance”), from accommodō (“adapt, put in...

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Acetyl coenzyme A

Noun 1. A compound, C25H38N7O17P3S, that functions as a coenzyme in many biological acetylation reactions and is formed as an intermediate in the oxidation of carbohydrates, fats, and proteins. Also called acetyl-coA. (www.thefreedictionary.com) 2. An important molecule in metabolism, used in many biochemical reactions. Its main function is to convey the carbon atoms within the acetyl group to the citric acid cycle (Krebs cycle) to be oxidized for energy production. (Wikipedia.org) 3. Acetyl CoA participates in the biosynthesis of fatty Acids and sterols, in the oxidation of fatty acids and in the metabolism of many amino acids. It also acts as a biological acetylating agent....

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