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Proteins have a crucial role in various biological activities. Get to know how proteins are able to perform as enzymes, ..

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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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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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Certain species are capable of expressing characteristics indicative of the state of the ecosystem they occupy. They are..