The postcranial bones of A.afarensis suggest:

Question

Quizplus · Accepted Answer

The postcranial bones of A.afarensis suggest a transition to erect bipedalism, as they show adaptations for a striding gait and weight-bearing on two legs.

Option B can be ruled out based on the same reason because knuckle-walking is a trait found in some species of great apes, and the postcranial bones of A.afarensis do not show any such adaptations.

Option C is also not the best choice as although A.afarensis may have spent some time in trees, its postcranial bones do not show adaptations for arboreal locomotion, such as curved fingers or a grasping big toe.

The Postcranial Bones of A.afarensis Suggest