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:
B. xylem and phloem. they transport water and nutrients throughout the plant
A. Organisms with less desirable traits do not reproduce
is the answer
