I am not 100% sure but I believe that because of increased manufacturing, the air got very polluted and this made many trees darker, like birch. So moths are usually lighter in color so many couldn’t really hide among trees and they were eaten. After some time, many moths mutated and also became darker to blend in when they were on trees to prevent being eaten by predators. In conclusion, the population decreased.
Was this the answer you were looking for?
Answer:
I think it might be A. I'm not sure.
<span>Erythropoietin is a Hematoprotein that is obtained from kidney as a response to the cellular hypoxia and it also helps in raising the levels of red blood cells in the bone marrow. Since the patient her is administered an injection of this there is possibility to see increased hematocrit which is the increased volume of red blood cells with respect to blood volume.</span>
Disease, competition, and predation.
