Stomata cover only ______________ of leaf surface?

Related Mcqs:

1. There are _________ stomata per square cm of leaf surface in Tobacco plants?

   A. 1200
   B. 12000
   C. 100,000
   D. 1000

2. The air spaces may comprise upto _________ of total volume of leaf surface?

   A. 30%
   B. 20%
   C. 40%
   D. 50%

3. The opening and closing of stomata is directly controlled by the___________?

   A. Temperature
   B. pH
   C. Light
   D. None of these

4. There are _________ hypothesis which may explain opening and closing of stomata?

   A. One
   B. Two
   C. Three
   D. Four

5. Low level of CO2 favours _________ of the stomata.

   A. Opening
   B. Closure
   C. Both of these
   D. None of these

6. Stomata open due to _________ of K+ into the guard cells from the surrounding epidermis

   A. Diffusion
   B. Active transport
   C. Osmosis
   D. All of these

7. The leaf is bilobed with midrib between them. The plant is____________?

   A. Saraccnia
   B. Dionaea
   C. Pitcher plant
   D. None of these

8. The only promoter of leaf senescence in the following plant hormones is________________?

   A. Gibberellins
   B. Cytokinins
   C. Auxins
   D. Abscisic Acid

9. The percentage of light absorbed by the leaf is ___________?

   A. 20%
   B. 15%
   C. 10%
   D. 1%

10. The place of attachment of leaf with the shoot is called__________?

    A. Pith.
    B. Pit.
    C. Petiole
    D. Ecdysone

    Updated by: Haya Rai