Crossword

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