Across
- 3. structure no longer used
- 5. different traits in the population
- 9. similar function but different structure
- 10. theory states best best-adapted traits survive and are passed on
- 13. when organisms need the same resources
- 15. adaption allowing an organism to blend into its environment
- 18. structure that is similar but has a different function
Down
- 1. a species reproduces more than it needs
- 2. a species that no longer exists
- 4. trait allowing an organism to survive better in the environment
- 6. the number of same species in one area
- 7. causes a new trait in the DNA
- 8. characteristic passed on through DNA
- 11. changes over time
- 12. decision of trait in an environment
- 14. organisms that are grouped and mate together
- 16. adaption making a species appear like a harmful one
- 17. choosing a mate based on appearance