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:
Answer:
because different cell types can perform different functions
Answer:
matter is: Anything that takes up space and has mass
30-50%
30% in the winter
50% in the summer
The ocean would be substantially cooler due to the lower levels of ice