Ecology

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Across
  1. 2. living factors in an enviorment
  2. 5. individual organisms of a single species that share the same geographical location
  3. 10. one organism benefits at the expense of another organism
  4. 11. Scientific discipline
  5. 13. anything
  6. 14. the exchange of matter through biosphere
  7. 16. total mass of living matter
  8. 17. the rule in its enviorment
  9. 19. large group of ecosystems
  10. 20. a chemical substance
Down
  1. 1. a relationship in which other organism is neither helped or harmed
  2. 3. non-living factors in an enviorment
  3. 4. organisms in the soil convert amonia
  4. 6. each step in food chain or web
  5. 7. organisms pursuing and consuming another organisms for food
  6. 8. a group of interacing populations
  7. 9. nitrogen into a form that is usable by plants
  8. 12. an area where organisms live
  9. 15. portion of the earth that supports life
  10. 18. when two or more species live together