Calvin cycle is responsible.
I’m pretty sure the answer is c. Protista. Hope this helps!
Answer: 160 mm HgTherefore, the partial pressure of oxygen is: PO2 = (760 mm Hg) (0.21) = 160 mm Hg, while for carbon dioxide: PCO2 = (760 mm Hg) (0.0004) = 0.3 mm Hg.
Explanation:
It’s C. I just recall hearing my teacher say that... sorry I have no explanation
