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This tutorial elaborates on the physical development of humans, particularly from puberty to adulthood. Read this tutori..

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Some of the body movements can be controlled at will, others cannot. The body has a motor program, which is the pattern ..

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This tutorial looks at some of the communities in freshwater lentic habitats. For instance, symbiosis occurs in a commun..

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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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