What happens as a result of changing the number of protons in an atom? O The atom becomes an ion of the same element

O The atom becomes an isotope of the same element.

O The atom becomes a different element.

O Nothing changes.​

The answer is water molecules are split.cellular respiration and photosynthesis are complement  reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins,  glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus,  when respiration begins, water molecules are split.