Why do adults have stem cells? A. They are responsible for maintenance and repair. B. They are left over from earlier development. C. They continue the growth of the body. D. They replace organs that are worn out.

Marianne is comparing two animals: a fruit fly and a fruit bat. she asks, "do a fruit fly and a fruit bat share a common ancestor in their evolutionary history? " according to evolutionary theory, what is the answer to marianne's question?

What is the number of phosphates in an atp molecule

Nucleic acid certain protein cell membranes certain carbohydrates