Question

Three major anatomical changes took place during the 2.5 million years between Australopithecus afarensis and the emergence of Homo erectus some 1.6 million years ago. Which of the following changes is NOT one of the three changes mentioned in the text?
a. Brain size increased from about 450 cc in Australopithecus afarensis to 1000 cc in Homo erectus.
b. There was an increase in sexual dimorphism.
c. There were modifications of the hips for bipedal locomotion.
d. There were modifications of the limbs for bipedal locomotion.

Answer

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