Across
- 2. the name of the ship that Darwin travelled on
- 3. natural selection is also known as the survival of the _________
- 5. principle that states that living species are descended from ancient ones; descent with __________
- 6. when two species evolve together
- 11. Structures that are similar
- 12. A characteristic that helps an organism survive
- 15. proposed the theory of evolution by natural selection
- 16. change over time
Down
- 1. the process by which evolution occurs - Natural ______
- 4. refers to the variety of living things
- 7. well-supported testable explanation
- 8. when organisms disappear from the Earth
- 9. preserved remains of ancient organisms
- 10. Islands that Darwin visited
- 13. The name of Darwin's book - the ____of species
- 14. had different shaped beaks depending on the island they were from