Biology Crossword puzzle

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Across
  1. 2. organisms
  2. 7. self-replicating material
  3. 9. lands, and ocean
  4. 10. various organisms and life in a habitat or ecosystem
  5. 12. advantageous relationship between
  6. 13. chemical reactions that occur in aerobic
  7. 14. the spreading of something like light
  8. 16. science that looks at cause and
  9. 17. transformation process from immature to mature form like butterflies
  10. 20. the process where water vapor turns into liquid
  11. 22. of heredity and characteristics
  12. 24. test theories
  13. 27. plant process where water is released through stomata
  14. 28. single-celled animal free-living in parasitic
  15. 29. series of events where nitrogen from air to soil to organisms and back
  16. 30. material that is transferred to children from parents
Down
  1. 1. the principles and procedures used to create
  2. 3. to make energy
  3. 4. how many structures are in a working and living
  4. 5. elements work together to keep a stable equilibrium
  5. 6. the interaction of organisms in a biological
  6. 8. the adaptation of organisms where only
  7. 11. animal that eats both plants and animals
  8. 15. group of spore-producing organisms
  9. 18. damp environments
  10. 19. spontaneous movement of molecules in a cell
  11. 20. genetic constitution investigation
  12. 21. organism association without benefit or
  13. 23. symbiotic relationship that is beneficial for
  14. 25. or beneficial genes survive
  15. 26. the circulation of water through the