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Decrease in jaw muscle size and strength

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Reference no: EM132479224

During the evolutionary history of hominins, there was a behavioral change: hominins began to cook their food. There were also structural changes: a decrease in jaw muscle size and strength and an increase in brain size.

  1. Which came first, cooking or a decrease in jaw muscle size and strength? Justify your answer by considering how the conditions for natural selection favoring a decrease in jaw muscle size and strength would have been met in an early population in the genus Homo.
  2. How did both cooking and a decrease in jaw muscle strength change the conditions for natural selection, leading to the evolution of increased brain size in the genus Homo?

Reference no: EM132479224

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