Across
- 2. Where organisms can choose their mate
- 4. Unused body part of an organism
- 6. Organisms compete for resources
- 7. Difference in DNA among a population
- 8. Process by which organisms who are better adapted to their environment survive
- 11. The remains of ancient organisms
- 12. A change in the form of a gene
Down
- 1. Transfer of genetics from one place to another
- 3. Each species has descended with changes from other species over time
- 5. Limbs of vertebrates
- 9. How an organism becomes accustomed to its environment
- 10. All the inhabitants of a particular area