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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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Plants are characterized by having alternation of generations in their life cycles. This tutorial is a review of plant m..

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A still body of water may be disturbed by a variety of factors. One of them is wind. In fact, it is considered as the pr..

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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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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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