Across
- 3. A living thing (page 28).
- 5. A tree-like diagram that shows evolutionary relationships.
- 11. When a population becomes divided by an event (273)
- 12. Another word for variety (page 259).
- 13. Process by which organisms with favorable adaptations survive and reproduce.
- 15. When genes change. Can be helpful or hurtful and contributes to variation (272).
Down
- 1. Famous scientist who wrote "On the Origin of Species"
- 2. A remnant or trace of an organism from the past.
- 4. Islands where Darwin made his most important observations.
- 6. An inherited trait that helps an organism survive.
- 7. The process of how organisms acquire adaptations over time.
- 8. Animals with a backbone.
- 9. When the environment changes and adaptations are no longer good for survival.
- 10. Things that have a common origin but do not perform the same function.
- 14. An organism from which others have descended.