Its stabilising. Since the selection pressure is against the extremes which are the normal blood and the sickle cell anaemia.
Coyotes- omnivores, vultures- scavengers, cattle- herbivores, alligators- carnivores
Answer:
: any of a series of chemical reactions in photosynthesis not requiring the presence of light and involving the reduction of carbon dioxide to form carbohydrate especially : calvin cycle.
The answer is A. Hardness
