Answer:
D. I.
maybe its D, I think it might be D
Answer:
because there are only 20 different amino acid but 64 possible condoms most amino acid are indicated by more than one condon.
Sickle cell anemia is persistent in the tropics because those with sickle cell anemia cant contract the malaria virus because of the shape of their blood cells, and this is advantageous in the tropics where there are more malaria cases. So those with sickle cell anemia live to pass on their genes.
The Skeletal system is responsible for all but B) Produce Vitamin D.