It can date back as far as the dinosaur age...
Diversity is produced by mutation, it is what causes life to have advantages or disadvantages, and thus allow survival of the fittest to choose which mutation is the best suited for it's environment.
Answer:
The answer is rhythmic contraction of the uterus wall.
Explanation:
this is because when muscle is overly used, it brings about contraction
Answer:
it b or d
Explanation:
that is the most important for scientistes to study
b tells what can be in the fossill or find in the fossill
so i think it b
