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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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This tutorial describes the different types and causes of brain damage. Find out how genetics, physical injury, lack of ..

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The hominid family diversified from the apes around 6 to 8 million years ago. Since then, the evolutionary path has prov..

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Geological periods is a study guide that cites the different geological periods on Earth's timeline. Each has a brief ov..

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