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

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Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..

Transpiration
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The movement of molecules (specifically, water and solutes) is vital to the understanding of plant processes. This tuto..

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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..

Darwin's Finches - Natural Selection
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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Plants protect themselves by releasing hydrogen peroxide to fight against fungal invasion. Another way is by secreting c..