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12 January, 22:44

Sickle cell anemia is a disorder common in the sub-Saharan region of Africa. Although sickle cell anemia is generally fatal, having one allele for the disorder is also known to make a person resistant to malaria. Research shows that in the areas where malaria is most common, the sickle cell trait is seen in more than 40% of the total population.

A bioaccumulation

B geographic isolation

C interbreeding

D natural selection

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  1. 13 January, 00:52
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    the answer to this question is d
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