The graph below shows the amount of Oxygen (O2) used and Carbon Dioxide (CO2) produced during cellular respiration. GAS LEVELS DURING CELLULAR RESPIRATION Hoy hung 12 19 Hours Based on the graph above, which of the following statements are evidence of the relationship between the levels of oxygen and carbon dioxide during cellular respiration? As the level of oxygen decreases., the level of carbon dioxide increases O The amounts of oxygen and carbon dioxide are constant over time. The amounts of oxygen and carbon dioxide are increasing over time. The amounts of oxygen and carbon dioxide are decreasing over time.