Across
- 2. abiotic
- 6. immigration
- 7. control
- 8. matte
- 11. oxygen
- 12. ecosystem
- 16. population
- 17. chlorophyll
- 19. drought
- 20. greenhouse
- 21. glucose
- 23. species
Down
- 1. hydrosphere
- 3. commensalism
- 4. immune
- 5. symbiosis
- 6. predator
- 9. mating
- 10. evaporation
- 13. recapture
- 14. decomposition
- 15. respiration
- 18. quadrats
- 22. fire