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

Related Mcqs:

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

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

2. Stomata cover only ______________ of leaf surface?

   A. 0.03 – 0.04%
   B. 10%
   C. 1-2 %
   D. 50%

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

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

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

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

5. 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

6. 95% of the cytoplasm of red blood cells is the___________?

   A. Antibodies
   B. Hemoglobin
   C. Enzymes
   D. Proteins

7. In HomoSapiens (Human) the fertilization occurs in the___________?

   A. Uterus
   B. Ovaries
   C. Oviduct
   D. Cervix

   Submitted by: Mansoor Ahmed Suhag

8. The single main opening of the sponge cavity is____________?

   A. Osculum
   B. Ostia
   C. Spongocoel
   D. None of these

9. At the induction of action potential opening of Na+ gate with influx of Na+ is a ___________ processes?

   A. Active transport
   B. Passive transport
   C. Diffusion
   D. none of these

10. Epinasty is controlled by_____________?

    A. Gibberellins
    B. Abscisins
    C. Auxins
    D. Cytokinins