At which times there is no net gaseous exchange between leaves and the atmosphere.

Related Mcqs:

1. The point at which there is no net exchange of gases between leaves and atmosphere is known as_____________?

   A. Neutral point
   B. Compensation point
   C. Parallel point
   D. Competitive point

2. Gaseous exchange in birds occurs at level of_______________?

   A. Alveoli
   B. Air sacs
   C. Bronchi
   D. Parabronchi

3. Gaseous exchange through the skin is known as ______________ respiration?

   A. Cuticular
   B. Cutaneous
   C. Skin
   D. Pulmonary

4. Megaphylls i.e. leaves with divided veins with an expanded lamina is a dharacteristic of ___________________?

   A. Lycopods
   B. Ferns
   C. Seed plants
   D. Both b and c

5. Chlorosis, i.e., yellowish hue on the leaves results from_____________?

   A. Accumulation of toxic waste products in leaves.
   B. Deficiency of chlorophyll.
   C. Short supplies of mineral nutrients in the soil.
   D. All of these

6. Rapid movement of leaves of mimosa on touching is an example of _____________?

   A. Turgor movement
   B. Nastic movement
   C. Tropic movements.
   D. Growth movement

7. Pulling upward of water and dissolved minerals towards the leaves through the xylem tissue is called__________?

   A. Transpiration pull
   B. Root pressure
   C. Ascent of sap.
   D. All of these

8. They are widespread as protective coatings on fruits and leaves?

   A. cholesterol
   B. waxes
   C. chitin
   D. all of these

   Submitted by: Maryam Aftab

9. Stoma, found in the epidermis of leaves closes when guard cells

   A. Gain Water
   B. Lose Water
   C. Exchange gas
   D. None of These

   Submitted by: Rana usama Ibrahim

10. Bifacial Leaves :

    A. Leaves of maze plant
    B. Leaves of mango plant
    C. Leaves of water lily
    D. None of these

    Submitted by: Name