Vocabulary 8/22/13

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Across
  1. 2. Stimulus to survive in an environment
  2. 4. Gradual accumulation of adaptations over time
  3. 5. A reaction to stimulus
  4. 8. Living things show an orderly structure
  5. 9. The ability to do work
  6. 10. The study of life
  7. 11. Organisms live in a constant interface with their surrounding
  8. 12. Condition in the environment that requires an organism to adjust
  9. 13. Anything that has characteristics of life
Down
  1. 1. Interface in amount of living material
  2. 3. Changers in the life of organisms
  3. 5. The production of offspring
  4. 6. Living is an effort to survive
  5. 7. Group of organisms that can be interbreed and produce fertile offspring