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

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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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Origins of Life on Earth

Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..

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Psychiatry & Mental Disorders

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

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Upon fertilization, a zygote forms and develops into an embryo. This tutorial elaborates on the growth and development f..