111. What causes opening of stomata
A. hin wall of guard cell facing stomatal pore is stretched more, curves in and the pore opens.
B. Thick wall of guard cell facing stomatal pore is stretched more, moves in and pore opens.
C. As thin wall of guard cell is stretched less, the guard cell wall facing the stomatal pore moves in and pore opens.
D. Thick wall of guard cell facing the stomatal pore is strectched less, moves, in and the pore opens
Answer : Option C
112. Whose water potential is less than water potential of root hair during water absorption by root hair
A. Gravitational water
B. Pure water
C. Vacuolar sap
D. Soil solution\
Answer : Option A
113. Tracheids are less efficient than vessels due to
A. Absense of closed end walls
B. Uneven thickeningS
C. Caspirian strips
D. Presence of tapering end walls
Answer : Option C
114. The space between plasma membrane and cell wall of a plasmolysed cell surrounded by a hypertonic solution is occupied by
A. Isotonic solution
B. Hypotonic solution
C. Hypertonic solution
D. Water
Answer : Option D
115. The process by which water is absorbed by solids like colloids causing them to increase in volume is
116. Sotmatal opening is influenced by
A. N2 concentration, \(CO_2\) concentration, light
B. \(CO_2\) concentration, temperature, light
C. N2 concentration, light, temperature
D. \(CO_2\) concentration, N2 concentration, temperature
Answer : Option D
117. 2% Nacl as compared to 18% glucose solution is
118. Water absorption by root hairs occurs untill
A. Concentration of water in the cell sap is higher
B. Salt concentration in cell sap is higher
C. They are separated from the soil by a selectively permeable membrane
D. Water potential is lower
Answer : Option B
119. Which pathway involves cell wall and inter cellular spaces ?
A. Vascular pathway
B. Protoplast pathway
C. Symplast pathway
D. Apoplast pathway
Answer : Option D
120. Glucose is not stored in plants due to its effect in
A. Decrease in osmotic pressure
B. Increase in osmotic pressure
C. ncrease in turgor pressure
D. Decreas in turgor pressure
Answer : Option C