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Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understa..

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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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This tutorial looks at some of the communities in freshwater lentic habitats. For instance, symbiosis occurs in a commun..

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In plants, growth occurs in meristems, which are the site of repeated cell division of unspecialized cells. These cells ..

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Organisms employ different strategies to boost its defenses against antigens. Humans have an immune system to combat pat..