Across
- 4. natural __-evolution where best suited survive
- 7. something that pollutes
- 8. to have young or offspring
- 10. the degree to which something varies
- 11. fill with more inhabitants than resources
- 12. a condition that causes harm to health of
- 14. an animal that hunts other animals for food
- 15. a sudden apparently abnormal change in genes
- 18. survival of the __- best suited will survive
- 20. the diversity of life forms on earth
Down
- 1. change in organism over time enables survival
- 2. the process or act of trying to win
- 3. limited __: when needful things not available
- 5. a group of living things that can mate
- 6. everything that surrounds living things
- 9. a variety
- 13. the theory that describes how all life forms
- 16. the child or young of a particular organism
- 17. an animal hunted and eaten by another animal
- 19. focus of evolution study in the Galapagos Islands