Across
- 3. the physiological reaction of a plant to the length of its exposure to light
- 6. a physiological process that requires a plant to undergo a cold period before it can flower
- 8. the ability of a plant to withstand cold temperatures
- 10. the prevention of injury or loss
- 12. the process of converting solar energy into stored chemical energy
- 15. the percentage of pore spaces within the total volume of a medium
- 16. a plant hormone involved in plant dormancy and plant responses to stress
- 17. a plant hormone that regulates the ripening of fruit, opening of flowers, and abscission of leaves
- 19. naturally occurring compound produced by a plant that regulates all growth and development
- 20. the decayed remains of plants, animals, and other organisms
- 21. a plant hormone that plays a roll in cell division and differentiation and cell enlargement
Down
- 1. a tiny pore in the epidermis of a leaf that regulates the exchange of gases
- 2. a device worn over the mouth and nose to prevent inhalation of dust, smoke, or other noxious substances
- 4. the practice of growing plant rots in a liquid
- 5. the physiological reaction of a plant to day and night temperatures
- 7. the stretching caused by an elongation of the internodes in response to low light intensity
- 9. the material in which a plant grows
- 11. compound that stimulates stem division and elongation and maintains apical dominance
- 13. a plant hormone that stimulates dormancy, flowering, and seed germination
- 14. a synthetic auxin used to promote rooting of cuttings
- 18. water vapor in the air