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Human intelligence provided the means to utilize abstract ideas and implement reasoning. This tutorial takes a further l..

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Obtaining air outside an aquatic environment required species to acquire suitable adaptations, and this was the case of ..

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The blood sugar level is regulated by two hormones. The mechanism behind this type of negative feedback control is descr..

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Different mental disorders are described here. Read this tutorial to get an overview of schizophrenia, affective mood di..

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It only takes one biological cell to create an organism. A single cell is able to keep itself functional through its 'mi..

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Humans are capable of only one mode of reproduction, i.e. sexual reproduction. Haploid sex cells (gametes) are produced ..