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Hormones are produced in the endocrine glands of animals. The pituitary gland and hypothalamus are the most impor..

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The human respiratory system is an efficient system of inspiring and expiring respiratory gases. This tutorial provides ..

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Movement of Molecules Across Cell Membranes

Molecules move within the cell or from one cell to another through different strategies. Transport may be in the form of..

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This tutorial looks at the mutation at the gene level and the harm it may bring. Learn about single nucleotide polymorph..

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The Homo Species

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