Across
- 9. GeologicalTimescale
- 10. Microevolution
- 12. Binomialnomenclature
- 14. Adaptation
- 15. Deuterostomes
- 16. Theory
- 19. Survivalofthefittest
- 20. Macroevolution
Down
- 1. NaturalSelection
- 2. Molecularclock
- 3. EndosymbioticTheory
- 4. Changesingenes
- 5. Hoxgenes
- 6. Speciation
- 7. Protostomes
- 8. Struggleforexistence
- 11. CharlesDarwin
- 13. Analogousstructure
- 17. Paleontologist
- 18. Fitness