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Homeostasis is essential to maintain conditions within the tolerable limits. Otherwise, the body will fail to function p..

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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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Still Freshwater & Plants

Plants in lentic habitats have features not found in terrestrial plants. They acquired these features as they adapt to t..

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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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Human Reproduction and Fertilization

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

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Plant organs are comprised of tissues working together for a common function. The different types of plant tissues are m..