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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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Human intelligence provided the means to utilize abstract ideas and implement reasoning. This tutorial takes a further l..

An artist depiction of a Precambrian multicellular life form.
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The nucleus containing the genetic material, DNA, and the mitochondria, well-identified as the "powerhouse of the cell",..

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Muscle cells are specialized to generate force and movement. Learn about the different types of muscle tissues in this t..

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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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The Homo Species

The evolution of the species of the genus "Homo" led to the emergence of modern humans. Find out more about human evolut..