Functions and External and Internal Structure of Foliage Leaves, Stomatal Opening and Closing, and Transpiration

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Across
  1. 1. stomata and _________ line the crypt
  2. 4. _________ cells which are in contact with guard cells provide a reservoir of water and K+
  3. 5. transpiration is a vital part of this cycle as eventually, it results to precipitation
  4. 6. type of mesophyll that is one or more layer thick and is responsible for most photosynthetic activity
  5. 10. area where the epidermis is depressed into the leaf
  6. 11. during the day, concentration of K+ in the guard cells gradually ____________
  7. 12. intensity of this dictates how many layers of palisades the plant will have
  8. 14. leaf stalk
  9. 15. when water enters the guard cells, they become _______ and move apart
  10. 16. hydrolysis of starch to malate/sucrose occurs when protons are pumped out of guard cells in response to ______ light
  11. 19. zone where enzymes that weaken cell walls are released which cause the leaf to fall off
  12. 20. most familiar type of leaf; large, flat and green
  13. 23. sucrose and _________ are osmotically active substances that increase in concentration and trigger the opening of stomata
  14. 26. type of mesophyll that is open, loose and allows CO2 to diffuse
  15. 28. when water leaves from the guard cells, the cells become ________ and the stomatal pore closes
Down
  1. 2. formed by two guard cells and is usually open during the day and close at night
  2. 3. tissue in the middle of the upper and lower epidermis
  3. 7. two photosynthetic small flaps at the base of petioles which protects shoot apical meristem
  4. 8. evaporation of water through stomata
  5. 9. concentrations of CO2 in the leaf lowers as it is used up in photosynthesis, therefore, it is important for the stomata to remain ________
  6. 10. type of action around the fiber cells bundle sheath extension to conduct water to reach mesophyll
  7. 13. sucrose comes from _________ of the polysaccharide starch which is stored in the guard cell chloroplasts
  8. 17. translucent and contains no chloroplasts except in guard cells; allow light to pass through and reach deeper parts of the leaf
  9. 18. one of the benefits of transpiration is that it contributes to the _________ movement of water from roots to leaves
  10. 21. expanded, light-harvesting and CO2-absorbing part
  11. 22. absence of petiole
  12. 24. a mutant that lacks the enzymes needed to hydrolyze starch
  13. 25. the ________ acid is a hormone that prevents the stomata to open especially during drought
  14. 27. pigment that strongly absorbs blue light and is associated with stomatal opening and closing