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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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Meet the colorful takahē, an extremely rare flightless bird. Find out more about its unique features and why they matte..

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

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Bryophytes

Bryophytes (nonvascular plants) are a plant group characterized by lacking vascular tissues. They include the mosses, th..