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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..

The human respiratory system is an efficient system of inspiring and expiring respiratory gases. This tutorial provides ..

Multicellular organisms evolved. The first ones were likely in the form of sponges. Multicellularity led to the evolutio..

According to Charles Darwin's theory of natural selection, preferable genes are favored by nature in the gene pool, and ..

Physiology is the study of how living organisms function. Thus, human physiology deals specifically with the physiologic..

The evolution of the species of the genus "Homo" led to the emergence of modern humans. Find out more about human evolut..

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