Answer:
Hair and nails are mostly made of protein. Your body uses protein to build and repair tissues. You also use protein to make enzymes, hormones, and other body chemicals. Protein is an important building block of bones, muscles, cartilage, skin, and blood.
Explanation:
I believe the answer is C
I read something in my textbook about all living organisms have history of the same genetic info =D
<span>Left b/c of harder workload
:)</span>
The answer is B
Ignore this need more letters