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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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Muscle cells are specialized to generate force and movement. Learn about the different types of muscle tissues in this t..

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Proteins have a crucial role in various biological activities. Get to know how proteins are able to perform as enzymes, ..

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This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good d..

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