Chapter 5 1&2

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Across
  1. 8. selection:A natural process resulting in the evolution of organisms best adapted to the environment.
  2. 9. ability to survive and reproduce under a range of environmental circumstances
  3. 11. by which two species evolve in response to changes in each other
  4. 12. relationship between two species in which both species benefit
  5. 16. formation of new and distinct species in the course of evolution
  6. 17. of an organism to survive and reproduce in its environment
  7. 19. selection:The breeding of plants and animals to produce desirable traits.
  8. 20. segment of DNA on a chromosome that codes for a specific trait
  9. 21. partitioning:differentiation of niches that enables similar species to coexist in a community
Down
  1. 1. feature that allows an organism to better survive in its environment
  2. 2. in which one animal (the herbivore) feeds on producers (such as plants)
  3. 3. over time
  4. 4. relationship between two organisms in which one organism benefits and the other is unaffected
  5. 5. change in a gene or chromosome.
  6. 6. relationship in which one organism lives on or in a host and harms it.
  7. 7. organism's particular role in an ecosystem, or how it makes its living.
  8. 10. relationship in which two different organisms live in close association with each other
  9. 13. drift
  10. 14. disappearance of all members of a species from Earth
  11. 15. interaction in which one organism kills another for food.
  12. 18. change in the gene pool of a population due to chance