Respiration returns to the astmosphere A oxygen
B carbon dioxide
C nitrogen

Answer - B. Carbon Dioxide
Explanation - Oxygen and glucose are the reactants of cellular respiration. The three products include is ATP which is used for energy. And the waste products returned to the atmosphere include carbon dioxide and water.

This is what i found on google“ the monomers combine with each other via covalent bonds to form larger molecules known as polymers. in doing so, monomers release water molecules as byproducts. this type of reaction is known as dehydration synthesis, which means “to put together while losing water. in the process, a water molecule is formed.” i hope this you

The answer is letter c