Across
- 5. process by which evolution occurs; natural ______
- 6. the name of the ship that darwin traveled on
- 8. when organisms disappear from the earth
- 10. structures that are similar
- 13. proposed the theory of evolution by natural selection
- 14. structures that have no current function
Down
- 1. a characteristic that helps an organism survive
- 2. islands that Darwin visited
- 3. had different shaped beaks depending on the island they were from
- 4. change over time
- 7. preserved remains of ancient organisms
- 9. well-supported testable explanation
- 11. the name of Darwin's book; the ___ of species
- 12. natural selection is also known as the survival of the ______