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This tutorial describes the sigmoid curve, annual plant growth, tree growth, human growth, and insect growth as the grow..

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While learning and intelligence are associated with the functions of a conscious mind, sleep and dreams are activities o..

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This tutorial deals with the abiotic factors of the freshwater environment that determine what sort of life would be sui..

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Osmoregulation is the regulation of water concentrations in the bloodstream, effectively controlling the amount of water..