biology

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Across
  1. 2. the spine.
  2. 3. changes in the body to fit a location.
  3. 4. the animal which live on land.
  4. 6. the study of environment.
  5. 7. a disease which is harmful.
  6. 9. being steady on a rope.
Down
  1. 1. the green substance in leaf.
  2. 4. relating to requiring free oxygen.
  3. 5. trees
  4. 8. water