Nitrogenous base, sugar and phosphate
Homeostasis refer to the metabolic balance being maintained by several processes. It may include having a stable internal physiologic condition such as the blood ph or body temperature. Among the options, the best answer would be c. the villi of the small intestine would increase the absorption of nutrients from small intestine to the blood.
CO2molecule is a reactant in the first step and a final product in the fourth step of the Calvin-benson