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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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Hormones are chemical messengers produced by specialized glands and they were produced by switching on the genes designe..

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complete-dominance
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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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Learn about community patterns and the ecological factors influencing these patterns. Revisit some of the ecosystems you..

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This tutorial deals with the structure and function of flowers, fruits, and seeds. Also included here are the types of f..