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The water cycle (also referred to as the hydrological cycle) is a system of continuous transfer of water from the air, s..

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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 elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..

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Plants need to regulate water in order to stay upright and structurally stable. Find out the different evolutionary adap..

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Viruses possess both living and non-living characteristics. This unique feature distinguishes them from other organisms...