Across
- 7. reproductive success, how well an organism adapted
- 8. similar structures evolved independently
- 9. separation by the changes in ecology
- 11. change to become better suited to an environment
- 12. a change in DNA sequence
- 15. a specific sequence of nucleotides in DNA or RNA
- 16. the process by which organisms developed
- 17. separation by reproduction times
- 18. structures similar in related organisms
- 20. organisms adapt and change for environment
Down
- 1. two populations grow independently
- 2. preserved remains of ancient organisms
- 3. structures with no apparent function
- 4. separation by a physical barrier
- 5. breeder chooses who to mate together
- 6. separation by chemical barriers
- 10. dying out or extermination of a species
- 13. existence of the best adapted organisms
- 14. separation by differences in behavior
- 15. a change in allele frequency in a population
- 19. separation from species to make a new species