Question

Are humans an example of natural selection?

Answer 1

Natural selection:

1. According to Darwin, variations occur in all individuals of a species. In the struggle for existence, only individuals with useful variations survive. This is known as natural selection.
2. Humans are an example of natural selection.
3. A very recent example of natural selection is the ability to tolerate lactose present in milk. Some regions have a long history of dairy farming and people from these regions can easily digest lactose because their intestine produces the lactase enzyme.
4. This is in contrast with people from other regions with no history of dairy farming, these people are unable to digest lactose since their intestines do not produce lactase.