1) natural selection
2) Slight differences between parents and offspring can eventually result in future generations that are very different from their ancestors.
3) ability to survive
4) develops through gradual processes over many generations.
5) Evolution through natural selection would not occur.
6) modern organisms have evolved from earlier species.
7) Humans, crocodiles, bats, whales, and birds evolved from a common ancestor.
8) They share a remote common ancestor.
9) birds
10) lamprey