What
type of mutation causes sickle cell anemia?

Sickle cell anemia is the result of a point mutation in the hemoglobin gene. Sickle cell hemoglobin (HbS) causes red blood cells to form a sickle shape. People who inherit one sickle cell gene and one normal gene have sickle cell trait.

Explanation:

Sickle cell anemia is the result of a point mutation in the hemoglobin gene. Sickle cell hemoglobin (HbS) causes red blood cells to form a sickle shape. People who inherit one sickle cell gene and one normal gene have sickle cell trait.

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.

frogs. the lower the ph the higher the acid content. frogs have the highest tolerance in this scenario.