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Different pregnancy and birth control and contraception strategies are described. Read this tutorial to learn each of th..

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Adaptation, in biology and ecology, refers to the process or trait through which organisms or the populations in a habit..

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

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

Physiological Homeostasis
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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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This tutorial introduces flowing water communities, which bring new and dithering factors into the equation for possible..