Which of the following is a somewhat confusing structure found in humans that is best explained by our evolutionary heritage?
A) tailbone
B) lack of body hair
C) upright posture
D) opposable thumb

Question

Quizplus · Accepted Answer

The presence of a tailbone, or coccyx, in humans is a vestigial structure that suggests an evolutionary history of having a tail, which was useful for balance and movement in our primate ancestors. However, as humans evolved to walk upright, the tail became unnecessary and eventually disappeared, leaving behind only the coccyx as a remnant.

Which of the Following Is a Somewhat Confusing Structure Found