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This tutorial describes the sigmoid curve, annual plant growth, tree growth, human growth, and insect growth as the grow..

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In this tutorial, find out more about certain types of inheritance that does not follow the Mendelian inheritance patter..

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Learn about community patterns and the ecological factors influencing these patterns. Revisit some of the ecosystems you..

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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..

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This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good d..

Chemical effects on plant growth and development
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Plants and animals need elements, such as nitrogen, phosphorus, potassium, and magnesium for proper growth and developme..