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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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Darwin and Natural Selection

This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..

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The circulatory system is key to the transport of vital biomolecules and nutrients throughout the body. Learn about the ..

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Gene Action – Operon Hypothesis

Learn how the way genes control and determine every aspect of the body. This lesson uses lac operon as an example. ..

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This tutorial noted some of the physical and chemical factors that provide the framework of a running water community in..