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Plants, like animals, produce hormones to regulate plant activities, including growth. They need these hormones to respo..

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There are more species of insects than any other species combined. This surely illustrates that insects have the selecti..

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..

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Kidneys and Regulation of Water and Inorganic Ions

The kidneys are responsible for the regulation of water and inorganic ions. Read this tutorial to learn about the differ..

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Lights’ Effect on Growth

This tutorial elaborates on the effect of light on plant growth. It describes how different plants require different amo..