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