Answer;
C. Photosynthesis uses some of the carbon dioxide released during the day.
Explanation;
-Cellular respiration is the process of conversion of food into energy. In this process, CO2 is formed and O2 is used. Photosynthesis on the other hand, is the process of formation of food by absorbing CO2 and releasing O2 as byproducts in plants.
-During day time, plants perform photosynthesis (since sunlight is present). Thus, plants use their own CO2 released by respiration process. Thus, during day time, plants give out more of O2 compared to CO2.
-However, during night time, plants perform only respiration and no photosynthesis (since absence of sunlight). Thus concentration of CO2 released is higher during night time.
