Answer:
Explanation:
This is because sickle cell disease is common in malaria dorminated area because their traits confers resistance to malaria. The red blood cells, which contain abnormal hemoglobin become sickle in shape after it has been affected by malaria parasite. Therefore, most American that have African ancestry are at high risk of
the disease because the African ancestry are carriers if this gene and are inherited by the Americans.
True.
A dichotomous key breaks down an organisms characteristics until you can fully identify it.
Okay what shall i help you with
You didn't put any answers, but probably environmental groups.