Leaves Crossword Puzzle

1. the stomata is below the surface of the leaf.
7. a mutant that lacks the enzymes needed to hydrolyze starch.
9. it release water from xylem and load sugar into phloem.
10. a color of the pigment that absorbs blue light strongly and, thus, is involved in stomatal opening and closing; probably located in guard cells.
14. stomata remain closed during a prolonged drought, even during the day.
15. it protects shoot apical meristem while shoot is the expanded, light-harvesting and CO2- still young and small.
16. attached to the stem and together, they form the shoot of the plant.
17. are usually open during the day and close at night.
18. an environmental signal to plants that leads them to modify their activities at the cellular and molecular levels.
20. it is usually consists of a single layer of parenchyma cells, translucent to allow light to pass through and reach deeper parts of the leaf.
21. the tissues between upper and lower epidermis.
22. evaporation of water through the stomata or cuticle.
23. due to the higher solute concentration inside the central vacuole of the guard cells, water from the epidermal cells surrounding the guard cells move into the guard cells by this process.
25. biological rhythms that follow an approximate 24-hr. cycle.

2. a type of mesophyll present in lower part of leaf that consists of open, loose aerenchyma where CO2 from stomata can easily diffuse in the air spaces and reach the palisade.
3. a type of mesophyll in upper part of leaf that has parenchyma cells with spaces in between them for CO2 absorption.
4. it is a set of cells, which may be parenchyma, collenchyma or sclerenchyma, that surround vascular bundles of a leaf.
5. it releases enzymes that weaken the cell walls and cause the leaf to abscise or fall off in autumn or when the leaf is old.
6. the expanded, light-harvesting and CO2- absorbing part of the leaf.
8. is internal to the plant and in some way measures time.
11. the leaf stalk that holds the blade out into the light and minimize shading of flowers and other leaves.
12. this happens to guard cells when they expand on the side with thinner cell walls and the pore opens.
13. it is 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.
15. cells that are in contact with the guard cells provide a reservoir of water and K+ that move into and out of the guard cells during stomatal opening/closing.
19. a process of starch to malate/ sucrose occurs when protons are pumped out of guard cells in response to blue light.
24. it is more prominent on the abaxial or lower side of leaves.