Yes because type O blood is the universal donor.
The answer is; Pepsin
Pepsin is first secreted by the chief cells of the stomach wall and the inactive precursor called pepsinogen. When pepsinogen interacts with the acidic environment of the stomach due to hydrochloric acid, it is turned to pepsin. The pepsin breaks down large protein molecules to smaller molecules.
Chemical factor
Physical factor
Climate factor
Chlorophyll is the chemical in leaves that absorbs light.