A walrus' hide accounts for approximately what percentage of its total body weight? 5 10 20 30
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Walruses that live on islands near Alaska have a thick fat layer under their skin; however, their ancestors did not have a fat layer as thick as it is now. In your own words and based on course material only, describe in as much detail as possible, the process that would have resulted in this population evolving a thicker fat layer over time (4 marks) Click on "next page" at the bottom of the screen after completing your response.
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