Across
- 3. a change in an organism that helps them survive in their environment
- 5. in danger of becoming extinct
- 11. man's destruction of this endangers species
- 12. scientist who studies fossils
- 13. imprint of an organism once alive
- 14. fossils and DNA are ____ to evolution
Down
- 1. survival of the fittest (2 words)
- 2. a species that is no longer alive
- 4. Darwin formed the ____ of evolution
- 6. the slow process by which species have developed over time
- 7. a mistake or variation in the DNA
- 8. a slight change in a trait
- 9. studied birds in the Galapagos
- 10. body parts that are similar across species are called ___ structures