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

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Independent Assortment and Crossing Over

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Viruses possess both living and non-living characteristics. This unique feature distinguishes them from other organisms...

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Chemical Composition of the Body

The body is comprised of different elements with hydrogen, oxygen, carbon, and nitrogen as the major four. This tutorial..

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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..