The bones of the fingers and toes of Au. afarensis are slightly curved, and the toes are much longer than the toes of modern human beings. This suggests to paleoanthropologists that
A) the bipedalism of Au. afarensis was even more efficient than that of modern human beings.
B) Au. afarensis did not move with a full striding gait, as later hominins did.
C) Au. afarensis lost tree-climbing ability.
D) the bipedalism of Au. afarensis was remarkably inefficient.

Question

Quizplus · Accepted Answer

The curved fingers and longer toes suggest that Au. afarensis retained some adaptations for tree climbing, indicating that their bipedalism was not as fully developed as in later hominins who had a full striding gait.

The Bones of the Fingers and Toes of Au