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With regard to the population size of a species and what factors may affect them, two factors have been defined. They ar..

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Apart from vitamins, the human body also requires high energy sources such as carbohydrates and fats. If you want an ove..

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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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There are more species of insects than any other species combined. This surely illustrates that insects have the selecti..

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Darwin and Natural Selection

This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..

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Cell Structure

A typical eukaryotic cell is comprised of cytoplasm with different organelles, such as nucleus, endoplasmic reticulum, G..