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

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This tutorial describes the different types and causes of brain damage. Find out how genetics, physical injury, lack of ..

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Effect of Chemicals on Growth & Development in Organisms

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

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Obtaining air outside an aquatic environment required species to acquire suitable adaptations, and this was the case of ..

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Freshwater ecosystem is comprised of four major constituents, namely elements and compounds, plants, consumers, and deco..