Across
- 3. theory that says once a species appears in the fossil record
- 4. organ no longer functional
- 9. organisms inherited from an ancestor
- 10. change in frequency
- 11. survival and/or reproduction
- 12. theory assuming that change comes gradually
- 13. natural and sexual selection
- 14. transfer of genetic material
- 15. how a new plant or animal is created
Down
- 1. have similar functions
- 2. a single phenotype is favored
- 5. traits are extremely favored
- 6. DNA
- 7. genetic diversity decreases
- 8. two or more species reciprocally