LS 3.2.4

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Across
  1. 4. Growth away from a stimulus is a ______ tropism.
  2. 6. The growth of a plant in response to light.
  3. 7. These botanists concentrate on orchard crops, vegetable growth, and house plants.
  4. 10. In a positive gravitropism, the roots grow this direction.
  5. 11. These types of plants need longer light periods so they usually flower in the summer. (hyphen used in answer)
  6. 12. Scientists who study plants.
  7. 14. Growth toward a stimulus is a ______ tropism.
  8. 17. Plants are able to move toward or away from external _______ by growing in a particular direction.
  9. 19. A change in the growth of a plant in response to a stimuli.
  10. 21. These botanists focus on how chemical interactions within plants and cells and tissue affect the way a plant grows and changes.
  11. 22. These are more rapid plant movements that are not related to the direction of a stimulus.
Down
  1. 1. These plants do not relate to a certain day length. (hyphen used in answer)
  2. 2. The regular rhythms of grow
  3. 3. When plants orient themselves to the sun's direct rays and follow them throughout the day.
  4. 5. These types of plants are those that flower during the short days of spring or fall. (hyphen used in answer)
  5. 8. These demonstrate thigmotropism by wrapping around objects to provide support for a plant as it climbs.
  6. 9. The growth of a plant in response to gravity.
  7. 13. The biological response of a plant to changes in the amounts of lightness and darkness within a 24-hour cycle.
  8. 15. Scientists believe circadian rhythms in plants are controlled internally by this.
  9. 16. A plant's growth response to touch.
  10. 18. In negative gravitropism, the roots grow this direction.
  11. 20. Botanists who study this learn the best way to grow different types of flowers.