The Making of the Fittest: Evolving Switches, Evolving Bodies


After the end of the last ice age 10,000 years ago, populations of marine stickleback fish became stranded in freshwater lakes dotted throughout the Northern Hemisphere in places like Alaska and British Columbia. These fish have adapted to a freshwater environment drastically different than the ocean.

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Curriculum Connections:

  • AP Biology (2012-2013) - 33
AP Biology (2012-2013)
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