Which of the following is the first distinctively hominin trait to appear in the fossil record?

Question

Quizplus · Accepted Answer

Upright walking, or bipedalism, is considered the first distinctively hominin trait to appear in the fossil record. This allowed for greater efficiency in movement and freed up the hands for tool use, which likely contributed to the development of other hominin traits such as increasingly sophisticated stone tools and increased brain size. The appearance of bipedalism is thought to have occurred around 4-6 million years ago in early hominin species such as Ardipithecus and Australopithecus. The other choices, sophisticated stone tools, increased brain size, and a very long period of parental care, all came later in hominin evolution.

Which of the Following Is the First Distinctively Hominin Trait