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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 are characterized by having alternation of generations in their life cycles. This tutorial is a review of plant m..

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

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Population Growth and Survivorship

This lesson looks at population attributes, regulation, and growth. It also covers population genetics, particularly gen..

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Human Reproduction and Fertilization

For human species to obviate extinction, reproductive mature adults should be producing viable offspring in order to con..