Across
- 2. from spilled
- 5. chemical and physical factors
- 8. cells working together
- 11. tissue working together
- 13. organisms live
- 16. look at cells
- 17. hands
- 18. nitrogen gas into unusable forms
- 19. down dead organic matter
- 20. nutrients from others
Down
- 1. eats plants
- 3. upon which an enzyme has its action
- 4. organisms living and interacting in an environment
- 6. with a nucleus
- 7. with no nucleus
- 9. only on dead
- 10. hunt them
- 12. preys on other organisms
- 14. own food
- 15. for eye protection