Plant Organ: LEAVES

19. What is the main function of most leaves? What otherfunctions might leaves perform?

20. What differences are there between monocot and dicotleaves?

21. How does a plant open and close itsstomata?

22. Explain mechanisms and processes required totransport sugar throughout the entire plant. Be detailed in yourexplanation.

23. The leaves of a cactus or a desert Euphorbiaceae areadapted to the desert. How are the leaves of these plants differentin both structure and function from a mapleleaf?

24. (Multiple Choice Question) The leaf of a plantappears green because:

a. All wavelengths of visible light are absorbed by theplant pigment chlorophyll except green which is reflected to theretina of the eye.

b. All wavelengths of visible light are reflected to theeye except green which is absorbed by the pigmentchlorophyll.

c. Chlorophyll is stained green

d. Leaves can only be green.