College Biology Bellringer: April 21, 2016--Evolution and Baby Tiger Sharks

Please open a second tab and copy/paste this article:

http://www.washingtonpost.com/national/health-science/for-sand-tiger-sharks-a-deadly-cannibalistic-battle-inside-the-womb-is-part-of-evolution/2013/04/30/2b14dbbc-b1bf-11e2-bbf2-a6f9e9d79e19_story.html?hpid=z3

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