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Hormones are essential in the regulation of the activity of the various biological systems of the human body. The ineffi..

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Types and Causes of Brain Damage

This tutorial describes the different types and causes of brain damage. Find out how genetics, physical injury, lack of ..

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Plants need to regulate water in order to stay upright and structurally stable. Find out the different evolutionary adap..

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The hominid family diversified from the apes around 6 to 8 million years ago. Since then, the evolutionary path has prov..

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