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Cell respiration is the process of creating ATP. It is "respiration" because it utilizes oxygen. Know the different stag..

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This tutorial elaborates on the physical development of humans, particularly from puberty to adulthood. Read this tutori..

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Nutrients in the soil are essential to the proper growth of a land plant. This tutorial deals with the properties of soi..

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Darwin's Finches are an example of natural selection in action. They are an excellent example of the way species' gene p..

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This tutorial investigates perception as two people can interpret the same thing differently. Know more about human perc..