Science lesson 9

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Across
  1. 5. long lasting close relationship at least one benefits
  2. 7. species divided to specialize
  3. 9. changes in dna
  4. 10. two or more species benefit
  5. 12. an organisms use of resources and functional role
  6. 13. disappearance of a species from earth
  7. 14. change over time
  8. 15. when one benefits and the other is not effected
  9. 17. ability to survive and reproduce under changing conditions
  10. 19. biological evolution that occurs by chance
Down
  1. 1. improvement of survival passed to future generations
  2. 2. only one benefits from other
  3. 3. process by new species are generated
  4. 4. 2 species evolve in response to each other
  5. 6. when an animal feeds on a plant
  6. 8. heritable trait that increases fitness
  7. 11. process of selecting traits
  8. 16. process of hunting and killing another species
  9. 18. how reproductively successful an organism in its environment
  10. 19. sequence of dna that codes a trait