Biology Crossword

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Across
  1. 1. A species that is integral to the ecosystem
  2. 3. A prolonged interaction between species
  3. 6. Not living
  4. 8. An interaction between two species that benefits one species at the cost of the other
  5. 10. A characteristic of an organism
  6. 11. The study of living creatures
  7. 12. An interaction between two species that is mutually beneficial
Down
  1. 2. An interaction between two species that benefits one species
  2. 4. The diversity of species in a given area
  3. 5. A species that can indicate the health of an ecosystem
  4. 7. Living
  5. 9. Differences between species and the members of a species