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This tutorial noted some of the physical and chemical factors that provide the framework of a running water community in..

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Genes are the blueprint of our bodies, a blueprint that creates a variety of proteins essential to any organism's surviv..

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Sensory Systems

A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal ..

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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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Pollution in Freshwater Ecosystems

There are many environmental factors that arise due to the usage of water in one way or another and for every action tha..