21. Stomatal frequency indicates.
A. Number of stomata per unit area
B. Rate of water loss
C. Rate of gaseous exchange
D. Width of stomatal aperature
Answer : Option A
22. In dorsiventral leaf, the number of stomata per unit area are generally.
A. Same on both the surface
B. More on lower surface (epidermis)
C. More on upper surface (epidermis)
D. Absent on upper surface
Answer : Option B
23. In isobilateral leaf, the number of stomata per unit area are.
A. More on upper surface
B. More on lower surface
C. Approximately same on both the surfaces
D. Absent on both the surfaces
Answer : Option C
24. In xerophytic leaf the stomata are situated.
A. On both surfaces
B. On upper surface
C. On lower surface
D. Absent from both surfaces
Answer : Option C
25. The loss of water in form of water drops is called.
26. Transpiration is unavoidable evil because of
A. Structure of leaf and harmful effect
B. Beneficial and harmful effect.
C. Maintenance of turgidity for growth
D. Gaseous exchange for photosynthesis and respiration
Answer : Option D
27. Plants with scotoactive stomata perform
A. \(C_4\)photosynthesis
B. CAM photosynthesis
C. \(C_3\) photosynthesis
D. An oxygenic photosynthesis
Answer : Option B
28. For keeping stomata open, besides\(K^+\) ions the guard cells require a constant supply of
29. Transpiration is a process related to
A. Osmosis
B. Diffusion
C. Activated transport
D. Facilitated diffusion
Answer : Option B
30. Rate of transpiration is inversely related to