Describe the minimum requirements for any electric circuit, describe the task for each element. like what is required within a home like how you turn on a light in your home.

1)there must be a potential difference within it (measured in Volts),
2)current must be flowing through it (measured in Amperes).
3)a power source (that defines the potential and supplies the current),
4)conductors (which connect the power source to the load),
5)load, which consumes current to do some work. 

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.