The first somewhat human brain probably developed about _________ million years ago.

Question

Quizplus · Accepted Answer

The first somewhat human brain probably developed about 4 million years ago, during the evolutionary transition from Australopithecus to Homo habilis. This is supported by fossil evidence of larger brain size and changes in cranial shape during this time period. Choice A (700 million years ago) is too early for the evolution of humans, and Choice B (250 million years ago) is too early for even the evolution of mammals. Choice C (10 million years ago) is too early for the development of a human-like brain.

The First Somewhat Human Brain Probably Developed About _________ Million