You have just discovered a new primate approximately 3.5 million years old. The

Question

You have just discovered a new primate approximately 3.5 million years old. The foramen magnum is positioned under the center of the skull on this primate, leading you to conclude that Select one: a. it was a hominin b. it was a Miocene ape c. it was the last common ancestor that humans shared with monkeys d. it locomoted via knuckle-walking You have just discovered a new primate approximately 3.5 million years old. The foramen magnum is positioned under the center of the skull on this primate, leading you to conclude that Select one: a. it was a hominin b. it was a Miocene ape c. it was the last common ancestor that humans shared with monkeys d. it locomoted via knuckle-walking You have just discovered a new primate approximately 3.5 million years old. The foramen magnum is positioned under the center of the skull on this primate, leading you to conclude that Select one: a. it was a hominin b. it was a Miocene ape c. it was the last common ancestor that humans shared with monkeys d. it locomoted via knuckle-walking

Explanation / Answer

C.

Foramen Magnum lies close to the center of the basicranium in human neonates and more posteriorly in non human primates.

As human infants grow, there foramen magnum remains in the center of the skull, while posterior drift of the foramen magnum occurs in non human primates.

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