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Hormones are essential in the regulation of the activity of the various biological systems of the human body. The ineffi..

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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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The nervous system is essentially a biological information highway. This tutorial gives an overview of the nervous syste..

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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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This tutorial investigates perception as two people can interpret the same thing differently. Know more about human perc..