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.

Question

Quizplus · Accepted Answer

The location of the foramen magnum (the opening for the spinal cord) toward the bottom of the skull is significant because it indicates a bipedal stance, as it allows the skull to balance on top of the spine.

On the Back of Your Skull You Can Feel a Small