Ch 31

5. (2 words) the chemical messengers that affect a plant’s ability to respond to its environment
6. this is the synthetic chemical that breaks down to release ethylene gas
7. this plant hormone promotes cell division and is used to promote lateral bud growth
12. this synthetic auxin is used to promote root formation on stem and leaf cuttings
14. this tropism is a plant’s growth response to touching a solid object
17. (2 words) when mixed with 2,4-D, this chemical was used in Vietnam to defoliate the jungles
19. these hormones were found in Japan after scientists discovered fungus-infected rice growing abnormally tall
20. these are nastic movements that occur in response to touching a plant
21. this acid is a hormone helps to bring about dormancy in a plant’s buds and seeds

1. this is a plant’s response to change in the length of days and nights
2. these are plant movements that occur in response to an environmental stimuli but are independent of the direction of stimuli
3. these are nastic movements that are responses to daily cycle of light and dark
4. this is a gradual plant response in which a plant grows either toward or away from an environmental stimulus
5. this type of tropism involves and plant growing toward a light source
8. this hormones is a gas at room temperature and is used to ripen fruit
9. (2 words) botanists refer to plant hormones as these because they may stimulate or inhibit plant growth
10. this is the detachment of leaves, flowers, or fruits from plants
11. this tropism is a plant’s growth response to a chemical
13. this is another name for solar tracking
15. this tropism is a plant’s growth response to gravity
16. this is natural auxin triggers an increase in plasticity of cell walls, allowing elongation to occur
18. plant hormones involved in plant cell elongation