Across
- 5. a period when an organism's growth or activity stops
- 7. the turning or bending of a plant or other organism in response to a touch stimulus
- 8. a plant's response toward or away from a stimulus
- 9. a plant hormone, regulates virtually every aspect of plant growth and development
- 11. chemicals that affect growth and development
- 12. (as of plant roots or shoots) in which gravity is the stimulus
Down
- 1. animals without a backone
- 2. the process of transformation from an immature form to an adult form in two or more distinct stages
- 3. a thing or event that evokes a specific functional reaction in an organ or tissue
- 4. animals with a backbone
- 6. a plant's respons to seasonal changes in the length of night and day
- 10. the orientation of a plant or other organism in response to ligh