dsgsagsagasgsa

Across

2. naturalselection
3. fitness
6. commondescent
8. lyell
9. evolution
13. traits
15. inherited
16. offspring
18. malthus

Down

1. adaptation
4. hutton
5. homologousstructure
7. beagle
10. lamarck
11. theory
12. darwin
14. mutation
17. fossil