Reactants. Reactants are the substances that are needed for a chemical reaction to occur. Without reactants there are no products.
The answer is (D).. Stomata
Answer: It is important that cells have a "control system" because without it cells would either divide too fast or cause tumors to grow (cancer), or divide too slow and not be able to perform their cellular functions which is why the cells are controlled.
Most carbon atoms have about 4 bonding in them.
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