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Autotrophs flourished, absorbing carbon and light. Soon after, primitive life forms that could assimilate oxygen thrived..

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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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Plants are responsible for incredible feats of molecular transformation. Plant processes, such as photosynthesis, photop..

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The Evolutionary Development of Multicellular Organisms

Multicellular organisms evolved. The first ones were likely in the form of sponges. Multicellularity led to the evolutio..

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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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Human Biology – Food and Digestion

This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good d..