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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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In plants, growth occurs in meristems, which are the site of repeated cell division of unspecialized cells. These cells ..

Regulation of Biological Systems
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Regulation of Biological Systems tutorials are focused on the modulation of biological systems from cell to population l..

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Inheritance and Probability

Gregor Mendel, an Austrian monk, is most famous in this field for his study of the phenotype of pea plants, including ..

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The Homo Species

The evolution of the species of the genus "Homo" led to the emergence of modern humans. Find out more about human evolut..

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Freshwater Lentic Communities & Animals

This tutorial looks at some of the communities in freshwater lentic habitats. For instance, symbiosis occurs in a commun..