Who noted the influence of language in the development of culture in his sociocultural theory?

Fraternal twins are more common than identical twins

Indicate whether this statement is true or false.

Evolutionary change is gradual. However, the genetic influence of the lactase enzyme has shown that

A) culture and genetic adaptations have influenced one another. B) lactose intolerance is not genetic nor cultural. C) Europeans tend to be most lactose intolerant. D) Asians have included increasing amounts of milk in their diet.