biology crossword

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Across
  1. 1. the response of a plant when it is touched
  2. 4. the response of a plant to a particular chemical
  3. 5. hormone that promotes cell division
  4. 7. get longer
  5. 8. testosterone and eostrogen are examples of these
  6. 9. any of a group of hormones that causes flowering
  7. 11. region of actively dividing plant cells forming new tissue
  8. 13. cutting off the top branches of a tree to stimulate growth
  9. 15. we react to these
  10. 17. C2H6
  11. 18. not derived from living organisms
  12. 20. a hormone that causes the elongation of plant cells
Down
  1. 2. this is where the plant turns towards the light
  2. 3. a group of similar cells grouped together
  3. 6. downward growth of plant roots is positive _ _ _ _ _ _ _ _ _ _
  4. 10. the process of cutting a tree back to ground level to stimulate growth
  5. 12. this is where the organism turns in a particular direction
  6. 14. acid plant hormone that promotes leaf detatchment
  7. 16. bud a bud that grows from the plant stem
  8. 19. derived from living organisms