In the 1940s, the scientist j. b. s. haldane linked many human red blood
cell disorders with the tropical regions where malaria occurs. haldane
hypothesized that the widespread presence of these red blood cell
disorders as well as traits that protect individuals from malaria were the
result of natural selection. haldane's hypothesis was later confirmed by
the research of a. c. allison.
the resistance to malaria carried by individuals in areas where malaria is
widespread is the result of -
a vaccine against malaria
b the individuals' genetic composition
cantibiotic medications
d the individuals' behavior in avoiding those with the infection