Across
- 2. Scientific name for humans
- 4. trait that improves ability to survive.
- 8. time between one stage of life and the next.
- 10. Earth is 4.6 _____ years old.
- 11. Well supported explanation tested and proven over time.
- 13. determining if something is older or younger than something.
- 15. individuals that are better adapted to their environment survive and reproduce
- 17. Breeding animals that have certain desired characteristics.
- 18. Primate that walked on two legs.
- 19. mammals with opposable thumbs.
Down
- 1. Time scale that divides Earth's natural history into parts.
- 3. Change over generations with new species arising.
- 5. The formation of new species as a result of evolution.
- 6. Developed Theory of Evolution by Natural Selection.
- 7. Remains of an organism preserved by geological processes.
- 9. A change in the sequence of DNA.
- 12. Genetically determined characteristic.
- 14. measuring the age of an object or event in years.
- 16. The appendix and wisdom teeth are examples.