PLANTS RESPONSE

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Across
  1. 2. A type of herbicide that kills weeds but not crop plants.
  2. 5. Growth response of a plant to gravity.
  3. 6. The process where plant cells become longer during growth.
  4. 7. Describes the bud found at the tip of a stem.
  5. 9. A chemical used to kill unwanted plants (weeds).
  6. 10. Supports the plant and transports water and food.
  7. 12. A plant's growth response to a stimulus.
  8. 14. The part of a plant that grows upward above the soil.
  9. 15. Plant hormone that promotes stem growth and seed germination.
  10. 16. The removal of the apical bud to encourage side branches to grow.
  11. 18. The part of a plant that absorbs water and minerals from the soil.
  12. 19. Describes buds or branches that grow from the sides of the stem.
  13. 21. A permanent increase in the size of a plant.
  14. 22. A change in the environment that causes a response.
Down
  1. 1. Type of plant defence involving physical structures such as thorns or spines.
  2. 3. Type of plant defence involving poisonous or harmful substances.
  3. 4. The process plants use to make food using sunlight.
  4. 7. Plant hormone that controls the direction of growth.
  5. 8. A reaction to a stimulus.
  6. 9. A chemical messenger produced by plants to control growth and responses.
  7. 11. Plant hormone that slows growth and helps plants survive drought.
  8. 13. The stimulus that causes phototropism.
  9. 16. Growth response of a plant to light.
  10. 17. The stimulus that causes geotropism.
  11. 20. Sharp structures that protect plants from herbivores.