Pekpekango Pekpekango Science Answered A diagram representing the relationship between photosynthesis and cellular respiration is shown below.The numbered boxes in the diagram represent which of the following? A. 1 - water; 2 - nitrogenB. 1 - nitrogen; 2 - oxygenC. 1 - oxygen; 2 - carbon dioxideD. 1 - carbon dioxide; 2 – water