Question

Another questions about Anthropology:

1.) Our earliest ancestors (3.5 – 7 million years ago) were different from other primates alive at the time because they... ( I know answer "D" is not right but can I have a feedback on what you think on these questions)

A. --> walked on two legs

B. --> had bigger brains

C. --> made tools

D. --> all of the above

2.) Which of these statements best summarizes the relationship between the birth canal and brain size during the course of hominin evolution? (Stuck between A, C or D)

A. --> "Natural selection has favored a tendency toward decreased brain size and a reduction in the size of the pelvic opening throughout hominin evolution."

B. --> "Brain size has become more important than bipedalism over the course of hominin evolution, and the pelvic opening has continually expanded to compensate for larger brains."

C. --> "Natural selection has struck a balance between the upright posture in bipedalism, which limits the expansion of the pelvic opening, and the tendency toward increased brain size."

D. --> "The birth canal has become narrower throughout hominin evolution, even as brain size has continued to increase."

3.) Which is NOT true about Neandertals? (Choosing between C or D)

A. --> They made and wore jewelry.

B. --> They buried their dead.

C. ---> They created art.

D. --> They crossed into the New World.

Answer 1

1.B walked on two legs.

Explanations -

Bipedalism (walking on two legs) has been developed before the human bigger brain development and developing of stone tools. The bipedalism in saheloanthropus can be expected whcih was as ealry as seven million year ago. The development of tool happened in lower palaeolithic period around 2.5 million years ago and brain size started increasing slowly in this period.

2.C.Natural selection has struck a balance between the upright posture in bipedalism, which limits the expansion of the pelvic opening, and the tendency toward increased brain size.

3.C.They created art.