Tumor-suppressor genes are important in the prevention of cancer because they

Tumor suppressor genes are genes that regulate the growth of cells. When these genes are functioning properly, they can prevent and inhibit the growth of tumors.

When tumor suppressor genes are altered or inactivated (due to a mutation), they lose the ability to make a protein that controls cell growth. Cells can then grow uncontrolled and develop into a cancer.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

"d.) carbon dioxide and hydrogen sulfide"