Answer:
Point mutations can cause serious changes to an organism if they change the way a protein works. A mutation in DNA alters the mRNA, which in turn can alter the amino acid chain. ... And a base substitution can also cause a silent mutation, in which the protein's function doesn't change at all.
When blood is in the lungs,
where oxygen is plentiful, oxygen easily binds to the first subunit and then quickly fills up the remaining ones. Then, as blood circulates through the body, the oxygen level drops while that of carbon dioxide increases. In this environment, hemoglobin releases its bound oxygen.
Photo Synthesis would be as plants grow from the sun or gain energy from the sun, where as Cellular Respiration is when cells divide into two or more. (I believe)
