Crossword Puzzle on Leaves, Stomatal Closure and Opening and Transpiration

3. releases enzymes that weaken the cell walls
6. leaves that have no petiole
7. type of plants that have no abscission
11. pigment that absorbs blue light strongly
13. the process of water movement through a plant and its evaporation from aerial parts
18. usually consists of a single layer of parenchyma cells
19. triggers the activation of proton pumps
23. if ______ is low,the stomata opensso that photosynthesis can continue
24. regulates the opening and closing of the stomata depending on the time of day
25. type of mesohpyll on the upper part of leaf

1. are tiny openings or pores in plant tissue that allow for gas exchange
2. process in which higher solute concentration inside the central vacuole of the guard cells causes water from the epidermal cells surrounding the guard cells move into the guard cells
4. type of mesohyll located on the lower part of leaf
5. stomata remain closed during a prolonged drought
8. holds the blade out into the light and minimize shading of flowers
9. joins the lamina to the stem at a node
10. release water from xylem and load sugar into phloem
12. evaporation of water through the stomata or cuticle and has a cooling effect on the plant as heat is carried away by the evaporating water
14. the expanded, light-harvesting and CO2- absorbing part of a leaf
15. the most familiar type of leaf which is large, flat and green.
16. formed by adjacent undamaged cells that swell and become corky and covers the wound left by the fallen leaf to protect the plant from pathogens
17. protects shoot apical meristem while it is young
20. a set of cells, which may be parenchyma, collenchyma or sclerenchyma, that surround vascular bundles of a leaf
21. the tissues between upper and lower epidermis
22. stomata is below the surface of the leaf,an area where the epidermis is depressed into the leaf with stomata