It compares the number of mutations that exist in the DNA of two different species.
Answer: lets say all you have to do is look around when your outside and look at the dirt or something and think ' how did it get here' was a man-made or natural.
Explanation:
pls put me brainiest!!
Connected to the occipital bones
Answer:
answer 1: because they harm us
answer. 2: they help with extra protection
answer 3: skin, eyes, nose, backbone