What do you notice happens to the number of the daily hours on December 21 as you go farther north

The true statement is that Oxygen cycles through the processes of photosynthesis and cellular respiration. During the process of photosynthesis the plants uses carbon dioxide, water and the energy from the sunlight to yield oxygen, simple sugars and energy; while in the process of cellular respiration Oxygen is used together with nutrients such as glucose to yield energy and carbon dioxide.