A skull with a foramen magnum positioned at the back of the skull belongs to:Group of answer choicesa species that is fully bipedal, such as a human.a species that is fully quadrupedal, such as a dog.a species that is transitioning between quadrupedal and bipedal.none of the above (this trait is observed only in prosimians).

A skull with a foramen magnum positioned at the back of the skull belongs to a species that is fully quadrupedal, such as a dog. The foramen magnum is the large hole in the base of the skull through which the spinal cord passes. In quadrupedal animals, it is positioned towards the back of the skull because the spine enters the skull at an angle due to the animal's horizontal posture. In contrast, in bipedal animals like humans, the foramen magnum is positioned more towards the bottom of the skull because the spine needs to enter the skull vertically due to our upright posture.