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Gregor Mendel's studies into Monohybrid and Dihybrid crossing and Charles Darwin's study of evolution and natural select..

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Plants and animals need elements, such as nitrogen, phosphorus, potassium, and magnesium for proper growth and developme..

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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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The evolution of the species of the genus "Homo" led to the emergence of modern humans. Find out more about human evolut..

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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..