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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..

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Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons an..

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Muscle cells are specialized to generate force and movement. Learn about the different types of muscle tissues in this t..

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Plants protect themselves by releasing hydrogen peroxide to fight against fungal invasion. Another way is by secreting c..

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Abiotic Factors – Water Conditions

A still body of water may be disturbed by a variety of factors. One of them is wind. In fact, it is considered as the pr..

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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..