Across
- 2. helps an organism survive in environments
- 5. similar structures in different species
- 8. movement of things into a population
- 9. difference in physical traits of same group
- 10. theory that evolution occurs slow and steady
- 12. movement of species out of a population
Down
- 1. same species living in a specific area
- 3. small group colonizes a new area
- 4. ability to survive and reproduce
- 6. any necessity of life
- 7. a type of genetic drift
- 11. an adaption in species