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  • Vertebrate Circulatorium

    Vertebrate Circulatorium

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    Compare and contrast the anatomy of the heart and the circulatory systems of major vertebrate groups and gain insights into their evolution.

  • Great Transitions Interactive

    Great Transitions Interactive

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    The fossils of transitional creatures were key evidence for Darwin’s evolutionary theory, but none had been found when he published On the Origin of Species. Now, there are many examples of such fossils, which clearly show that big evolutionary leaps consist of many smaller steps.

  • Genetic Switches

    Genetic Switches

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    Learn about how gene switches can control expression of genes in different tissues.