Across
- 4. structure that shows evidence of a past structure
- 7. structure that is similar and has a common ancestry
- 9. type of bird studied by Darwin
- 11. formation of a new species
- 15. sum of all genes in a population
- 16. wrote Principles of Geology
- 17. published On the Origin of Species
- 18. success in survival and reproduction
Down
- 1. structure that is similar but no common ancestry
- 2. islands visited by Darwin
- 3. preserved remains of an organism
- 5. said that aquired characteristics are passed on to offspring
- 6. changing of a species so it is better suited to its environment
- 8. group of like organisms that can produce fertile offspring
- 10. economist that influenced Darwin
- 12. change over time
- 13. adding new genes into a gene pool
- 14. change in the gene pool caused by chance events