MCAT Question of the Day
    •

    Q:

    		 The origin of goosebumps is largely unknown. Since goosebumps make hair stand upright, it may have been used human evolutionary ancestors to appear larger in size. It may have also served to insulate heat. This information suggests that goosebumps are which of the following?
    		 

    A

    		 Involuntary

    B

    		 Voluntary

    C

    		 Hyperactive

    D

    		 Vestigial



    Evolution |
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