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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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The diversification of several new species from a recent ancestral source, each adapted to utilize or occupy a vacant ad..

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DNA is a double helix structure comprised of nucleotides. A nucleotide, in turn, is made up of phosphate molecule, deoxy..

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Neurons generate electric signals that they pass along to the other neurons or target tissues. In this tutorial, you wil..

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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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This tutorial noted some of the physical and chemical factors that provide the framework of a running water community in..