Answer:
d they do not produce a protein
Explanation:
Sickle-cell disease is common in tropical and sub-tropical regions because being a carrier, carrying a single sickle-cell mutation (sickle cell trait), affords some resistance to malaria.
Answer:
C Horses and Zebras
Explanation:
Zebras are a different species of a horse that lives in Africa.
includes the brain and spinal cord
Pesticide use can be very harmful beacause too much of them can cause the crops to go bad, and kill bees which help spread pollen and enhance the crops.