Question

Why did 40% of the human population evolve to tolerate lactose?(1 point)ResponsesWithin cultures that rely on milk-producing animals, individuals who tolerated lactose had a survival advantage.Within cultures that rely on milk-producing animals, individuals who tolerated lactose had a survival advantage.Babies rely on milk to survive, so they need to be able to tolerate lactose.Babies rely on milk to survive, so they need to be able to tolerate lactose.Lactose tolerance allows people to enjoy a wide variety of food, including milk, butter, ice cream, and cheese.Lactose tolerance allows people to enjoy a wide variety of food, including milk, butter, ice cream, and cheese.People who have an intolerance experience physical pain, so a tolerance evolved to avoid that.

Answer 1

The correct response is: **Within cultures that rely on milk-producing animals, individuals who tolerated lactose had a survival advantage.**

This is because in pastoral societies where dairy products were a significant part of the diet, individuals with lactose tolerance could extract additional nutrients from milk without suffering from the negative effects of lactose intolerance, giving them a reproductive and survival advantage that led to the spread of this trait.