<span>They are Carbohydrates.</span>
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When members of the same species become adapted to new environments
This is a case of both Rh incompatibility and ABO incompatibility. Since the first pregnancy is normal but the second one resulted in hemolytic disease; it means that in the first pregnancy, the baby was Rh negative which lead the Rh positive mother to produce antibodies against Rh negative blood, which is noted in the second pregnancy leading to hemolytic disease. There may also be a form of ABO incompatibility. The correct answer is that both of her children are type A, Rh negative, and the mother is a type B, Rh positive.