Across
- 3. struggle to get necessities
- 4. When two things mate over and over again
- 6. a desired trait of an individual
- 10. Make things better adapted to environment
Down
- 1. adapted to the environment to make the same kind
- 2. All the ____ would survive it would be overpopulated
- 5. Darwin performed works of naturalists and _______
- 7. natural process by which something takes place
- 8. Darwin bred himself
- 9. Wipe out most of the local population of fish