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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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This lesson is about the methods used for ecological research, such as quadrat and transect sampling, canopy fogging, an..

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This tutorial presents Gregor Mendel's law of dominance. Learn more about this form of inheritance and how it can be pre..

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