Ademented scientist creates a new temperature scale, the "z scale." he decides to call the boiling point of nitrogen 0 ∘z and the melting point of iron 1000 ∘z. what is the boiling point of water on the z scale?

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.