Question

"Australopithecus had brains which _____ were than modern human brains."

A. More dense
B. Smaller
C. Larger
D. More folded

Answer 1

The correct answer to fill in the blank is B. Smaller, as Australopithecus species had significantly smaller brains compared to modern humans.

Step-by-step explanation:

"Australopithecus had brains which _____ were than modern human brains." The correct answer is B. Smaller.

While Australopithecus species, such as Australopithecus afarensis and Australopithecus africanus, were bipedal and shared some common features with modern humans, their brain sizes were significantly smaller. For instance, Australopithecus africanus had a brain size of about 500 cubic centimetres, which is less than one-third the size of modern human brains which range from 1200 to 1400 cubic centimetres.

In contrast, Neanderthals had larger brains than modern humans, but this did not necessarily indicate greater intelligence as different parts of their brains were more developed. Furthermore, intelligence is not solely determined by brain size; it's also the internal structure and organization that matters.