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The body is comprised of different elements with hydrogen, oxygen, carbon, and nitrogen as the major four. This tutorial..

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This tutorial looks at some of the communities in freshwater lentic habitats. For instance, symbiosis occurs in a commun..

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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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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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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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The cell is defined as the fundamental, functional unit of life. Some organisms are comprised of only one cell whereas o..