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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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This tutorial describes the different types and causes of brain damage. Find out how genetics, physical injury, lack of ..

Principles of Hormonal Control Systems
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Hormones are essential in the regulation of the activity of the various biological systems of the human body. The ineffi..

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The nervous system is essentially a biological information highway. This tutorial gives an overview of the nervous syste..

Gene Regulation in Eukaryotes
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Learn about the general structure of a eukaryotic gene, the transcription factors, and post-transcriptional regulation....

Cell Biology
Cell Biology

The cell is defined as the fundamental, functional unit of life. Some organisms are comprised of only one cell whereas o..