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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..

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

IQ, Creativity and Learning
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Human intelligence provided the means to utilize abstract ideas and implement reasoning. This tutorial takes a further l..

Principles of Hormonal Control Systems
Principles of Hormonal Control Systems

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