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Dinosaurs represented a major turn in the evolutionary development of organisms on Earth. The first dinosaurs were presu..

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Meiosis is a form of cell division that creates gametes. It is comprised of two divisions that in the end, the resulting..

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Physiology is the study of how living organisms function. Thus, human physiology deals specifically with the physiologic..

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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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