Sharks have inhabited the oceans for more than 400 million years. Join shark expert Jeffrey Graham as he describes the adaptations that have allowed these magnificent creatures to thrive over the millennia. Learn how shark biologists study shark physiology, life history, and behavior for insight into what allows these animals to rank among the world's most efficient predators. (#16782)
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K-12 Educational Standards
Standards for Grade(s): 7
3. Biological evolution accounts for the diversity of species developed through gradual processes over many generations.
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