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Geological periods is a study guide that cites the different geological periods on Earth's timeline. Each has a brief ov..

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Apart from vitamins, the human body also requires high energy sources such as carbohydrates and fats. If you want an ove..

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

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Neural Control Mechanisms

Neurons generate electric signals that they pass along to the other neurons or target tissues. In this tutorial, you wil..

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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 ..