Across
- 2. - well-supported testable explanation
- 4. - islands that Darwin visited
- 5. - pattern of evolution where a species is stable for a long time then rapidly changes equilibrium
- 9. - proposed the theory of evolution by natural selection
- 11. - structures that have no current function
- 12. - natural selection is also known as the survival of the
- 13. - the name of Darwin's book; the of species
- 15. - principle that states that living species are descended from ancient ones descent with
- 19. - had different shaped beaks depending on the island they were from
- 20. - when two unrelated organisms look alike (sharks & dolphins)
- 21. - required for new species to form
- 24. - change over time
Down
- 1. - the study of the earth
- 3. - when one species evolves into many adaptive
- 6. - had different shaped shells depending on the island they were from
- 7. - when organisms disappear from the earth
- 8. - refers to the variety of living things
- 10. - structures that are similar
- 14. - process by which evolution occurs natural
- 16. - when two species evolve together
- 17. - a characteristic that helps an organism survive
- 18. - formation of new species
- 22. - the name of the ship that darwin traveled on
- 23. - preserved remains of ancient organisms