Question

Which ancestor existed in the timeframe of 4–1.8 million years ago and displayed semi-erect to upright posture?

Options

• Dryopithecus

• Homo habilis

• Australopithecus

• Homo erectus

Answer 1

Australopithecus, existing 4–1.8 million years ago, is characterized by semi-erect to upright posture and small cranial development. This species inhabited open habitats and represents a crucial intermediate stage between the fully ape-like ancestors and the more advanced Homo species.