biology

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Across
  1. 2. plants
  2. 3. important species at the top
  3. 5. model that shows relationships between trophic levels
  4. 10. water,carbon,nitrogen,phosphorous
  5. 12. s-shaped carrying capacity reached
  6. 13. hawk
  7. 15. cricits
  8. 16. optains energy from any level of pyramid
  9. 18. beneficial relationship
  10. 19. nonliving factors
Down
  1. 1. one benefits other is unaffected
  2. 4. mouse
  3. 6. parasitism and overcrowding
  4. 7. living organism that must eat for energy
  5. 8. living factors
  6. 9. J-shaped unrestricted growth
  7. 11. factor that restricts numbers
  8. 14. one benefits other is harmed
  9. 17. producers other name