Question

Why did 40% of the human population evolve to tolerate lactose?(1 point)

1: Within cultures that rely on milk-producing animals, individuals who tolerated lactose had a survival advantage.


2: People who have an intolerance experience physical pain, so a tolerance evolved to avoid that.


3: Babies rely on milk to survive, so they need to be able to tolerate lactose.


4: Lactose tolerance allows people to enjoy a wide variety of food, including milk, butter, ice cream, and cheese.

Answer 1

Answer: The correct answer is 1: Within cultures that rely on milk-producing animals, individuals who tolerated lactose had a survival advantage.

Reason why its correct is: The answer is correct because within cultures that rely on milk-producing animals, individuals who tolerated lactose had a survival advantage. This means that people who could digest lactose were able to consume milk and milk products, which provided them with a valuable source of nutrition. This gave them an advantage over those who could not tolerate lactose and may have helped them survive and reproduce more successfully.

Answer 2

1: Within cultures that rely on milk-producing animals, individuals who tolerated lactose had a survival advantage.

Step-by-step explanation:

40% of the human population evolved to tolerate lactose because 1: within cultures that rely on milk-producing animals, individuals who tolerated lactose had a survival advantage.

The ability to digest lactose into adulthood (lactase persistence) became advantageous to humans after the invention of animal husbandry and the domestication of animal species that could provide a consistent source of milk. This is because milk is a good source of calories, protein, and other nutrients. Individuals who were able to digest lactose were able to get more of these nutrients from milk, which gave them a survival advantage.