Which of these is true about chins?
A.Chins could help scientists figure out why humans are like animals.
B.Chins could help scientists figure out why modern humans lived on.
C.Chins have always been good at protecting the jaw.
D.Chins are the small bones that all ancestors have shared.
C. Chins have always been good at protecting the jaw.
The true statement about chins from the options provided is:
D. Chins are the small bones that all ancestors have shared.
To determine which statement about chins is true, we can evaluate each option and provide the explanation for finding the correct answer:
A. "Chins could help scientists figure out why humans are like animals."
This statement is not entirely accurate. While studying chins might provide insights into human evolution, it cannot specifically explain why humans are like animals. The comparison between humans and animals encompasses a wide range of characteristics beyond just chins.
B. "Chins could help scientists figure out why modern humans lived on."
This statement is also not entirely accurate. The existence or features of chins are not directly related to why modern humans survived or lived on. Factors such as intelligence, adaptability, and social behavior played a more significant role in human success.
C. "Chins have always been good at protecting the jaw."
This statement is incorrect. Chins do not primarily serve a protective function for the jaw. Instead, they are primarily an anatomical feature located beneath the lower lip and comprised of the mental protuberance of the mandible.
D. "Chins are the small bones that all ancestors have shared."
This statement is incorrect as well. Chins are not small bones shared by all ancestors. The chin refers to the anterior (front) part of the lower jaw bone or mandible, which is unique to humans and a few primate species. It is not universally present in all organisms or ancestral lineages.
Based on the explanations provided, none of the given options are true.