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Hormones are produced in the endocrine glands of animals. The pituitary gland and hypothalamus are the most impor..

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Birth Control and Contraception

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

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Lights’ Effect on Growth

This tutorial elaborates on the effect of light on plant growth. It describes how different plants require different amo..

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Molecules move within the cell or from one cell to another through different strategies. Transport may be in the form of..

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The cell is defined as the fundamental, functional unit of life. Some organisms are comprised of only one cell whereas o..

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ATP & ADP – Biological Energy

ATP is the energy source that is typically used by an organism in its daily activities. The name is based on its structu..