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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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Control of Growth & Development tutorials look at how the genetic makeup determines the biological processes on a da..

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Some of the body movements can be controlled at will, others cannot. The body has a motor program, which is the pattern ..

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Plant organs are comprised of tissues working together for a common function. The different types of plant tissues are m..

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This tutorial elaborates on the effect of light on plant growth. It describes how different plants require different amo..