Across
- 1. stomata is below the surface of the leaf
- 3. stomata remains _____ during a prolonged drought, even during the day
- 5. The most familiar type of leaf
- 6. This is internal to the plant and in some way measures time.
- 11. The other word for leaf blade
- 14. a set of cells that surround vascular bundles of a leaf
- 20. valuable in plant identification
- 22. Has a cooling effect on the plant
- 23. branches off from the midrib
- 24. cellular and molecular levels
- 25. a factor of transpiration; increases the rate of transpiration while humid air decreases it since the
- 26. Area where the epidermis is depressed into the leaf with stomata.
- 27. a factor of transpiration; more water is lost from a plant at higher temperature
- 28. are tougher and waxier than ordinary foliage leaves and often have no petiole
Down
- 2. Releases enzymes to weaken the cell walls
- 4. environmental signal to plants that leads them to modify their activities
- 7. More prominent on the abaxial side of leaves.
- 8. covers the wound left by the fallen leaf
- 9. Protects the shoot apical meristem while shoot is still young and small
- 10. During the day, the concentration of this ion in the guard cells gradually decreases
- 12. something guard cells have but ordinary epidermal cells don't.
- 13. biological rhythms that follow an approximate 24-hr. cycle.
- 15. branch off from the lateral vein
- 16. is already saturated or nearly so with water.
- 17. Allows a leaf to flutter in the wind
- 18. usually consists of a single layer of parenchyma cells
- 19. Along with the foilage leaves, they form the shoot of the plant.
- 21. the tissues between upper and lower epidermis