What is the mortality rate of sickle cell anemia in the africa?

Legumes, a type of plant, require rhizobia, a type of soil bacteria, to survive since these organisms fix nitrogen during photosynthesis. rhizobia use the legumes for food. what would most likely happen to the legume population if rhizobia suddenly became extinct?

As a small change in a person's dna can cause a genetic disorder

Physical characteristics of down syndrome