On the Back of Your Skull You Can Feel a Small

question 69

Multiple Choice

On the back of your skull you can feel a small bump, below which is an opening where the spinal cord enters the skull. The location of this opening toward the bottom of the skull is significant in evolutionary biology for what reason?

• A) It allowed for the hominin brain to grow much larger than other primates.
• B) It provided greater protection for the spinal cord.
• C) It occurred as a result of the change to a bipedal stance.
• D) This change was necessary for the increase in size from prosimian forms to anthropoid forms.

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Multiple Allele System

Gene for which three or more alleles persist in a population at relatively high frequency.

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