Answer:
Protein
Explanation:
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.
Answer:
the study of the structure, reaction, and composition of different kinds of substances
Explanation:

A surrogate mother donates her uterus to assist another woman who cannot become or stay pregnant because that another woman has some problem in getting her eggs produced or in getting fertilized.
Surrogate is a process in which a woman's egg is getting fertilized artificially with the sperm of a man who belongs to a couple. After the egg gets fertilized then, that fertilized egg is transferred to the uterus of a woman who belongs to above mention couple.
So a third person will help a couple to have a baby, and that third person is called a surrogate mother who donates his uterus. This surrogate mother is called a biological mother.
Learn more about surrogate mother here
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Smokers have a greater chance of developing deadly diseases. please select the best answer from the choices provided.
-true
(BPCO, cancer,