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This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good d..

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This tutorial elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..

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Photosynthesis is the process that plants undertake to create organic materials from carbon dioxide and water, with the ..

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The hominid family diversified from the apes around 6 to 8 million years ago. Since then, the evolutionary path has prov..

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

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Organisms employ different strategies to boost its defenses against antigens. Humans have an immune system to combat pat..