Biology Crossword Puzzle

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Across
  1. 3. major or global communities of organisms
  2. 6. one organism benefits, other unharmed
  3. 7. place where animals live
  4. 9. organisms with a great impact on its ecosystem
  5. 11. organism that feeds on dead or decaying matter
  6. 12. organisms that can survive in extreme conditions
  7. 13. complex network of feeding relationships
  8. 16. includes all ecosystems
  9. 18. found in cold, nutrient-rich waters
  10. 20. organisms use chemicals to produce their own food
  11. 21. similar to pelagic zone
  12. 23. species living in similar niches but are found in different geographical regions
  13. 24. interaction between two organisms
  14. 26. includes one or more physically similar species
  15. 27. ocean zone with the most biomass
  16. 29. an individual living thing
  17. 30. organisms move out of an area
  18. 31. organism can produce its own food
  19. 33. far northern latitude, permafrost
  20. 35. branch of science that names/classifies organisms
Down
  1. 1. maximum number of organisms that an environment can handle
  2. 2. tiny free-floating plant organisms in the water that carry out photosynthesis
  3. 4. marine ecosystem that has both saltwater and freshwater
  4. 5. factors needed for an organism to survive
  5. 8. area of land that drains to a body of water
  6. 10. organism that eats a specific organism
  7. 12. complete darkness, 2000m below sea level
  8. 14. dry climate, low precipitation
  9. 15. variety of organisms in an area
  10. 17. branch of science that studies the interactions of organisms
  11. 19. organism kills and eats another organism
  12. 22. group of species living in the same area
  13. 25. living things in a biosphere
  14. 28. group of same species in an area
  15. 32. boreal forests, short summers, long winters
  16. 34. highest level of the taxonomic classification system