Answer:
A. Water
Explanation:
H2O means that there are two hydrogen and one oxygen in every water molecule.
Answer:
Normal cells are either repaired or die (undergo apoptosis) when they are damaged or get old. Cancer cells are either not repaired or do not undergo apoptosis.
Explanation:
Answer:
When a solid turns to a gas.
Explanation:
Answer: The answer would be minerals. Synthetics are made by men, and shouldn't be found in the earth Vitamins are organic Cement is a mixture of an organic compounds and rarely found in nature.