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The water cycle (also referred to as the hydrological cycle) is a system of continuous transfer of water from the air, s..

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A running water environment offers numerous microhabitats for many types of animals. Similar to plants, animals in lotic..

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Stems primarily provide plants structural support. This tutorial includes lectures on the external form of a woody twig ..

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