Plant Sensory Systems and Responses

1. - Plant hormone likely involved in thigmomorphogenesis.
4. - Example of thigmotropism, touch-sensitive structures in plants.
8. - Protective outer covering of plants that helps discourage animals and pathogens.
12. - Tissue produced during thigmomorphogenesis to add stiffness and resist mechanical stress.
13. - Growth and development of plants in response to light.
15. - Touch response independent of the direction of stimulus.
17. - Mechanisms plants use against herbivores and pathogens.
18. - Hormones responsible for cell elongation in phototropism and gravitropism.
19. - Plant hormone likely involved in thigmomorphogenesis.
20. - Specialized plastids that settle downward in response to gravity.

2. - Defense mechanism of plants against herbivores and pathogens.
3. - Protein-based receptors responsible for mediating the phototropic response.
5. - Specialized plastids that contain starch granules and settle downward in response to gravity.
6. - Slow developmental change in the shape of a plant subjected to continuous mechanical stress.
7. - Growth response of roots and shoots in relation to gravity.
9. - Protein-based receptors that work together with phototropins to mediate the phototropic response.
10. - Movement of a plant subjected to constant directional pressure.
11. - Directional response of plants towards or away from light.
14. - Defense mechanism of plants against herbivores and pathogens.
16. - Plant with modified leaves that close quickly when triggered by touch.