91. A higher plant cell covered with cutin and suberin is placed in water, after 15 minutes, the cell
A. Will be killed
B. Size will increase
C. Size will remain unchanged
D. Size will decrease
Answer : Option D
92. Plant cell kept in hypertonic solution will get
93. The movement of free atoms from higher concentration to lower concentration is called.
94. Plasmolysis is due to
95. Cotton fibres dipped in water absorb water through
96. With rise in turgidity, wall pressure will
97. Root pressur is due to
A. Active absorption
B. Passive absorption
C. Increased transpiration
D. ncreased photosynthesis
Answer : Option D
98. Adding solute to pure water will cause development of
A. Positive water potential
B. More positive water potential decreases \( ?_s\)
C. More negative water potential will not change \(?-s\)
D. Negative water potential
Answer : Option A
99. Rate of transpiration is highest when
A. Soil is wet and air is dry
B. Soil is wet and air is hunid
C. Soil is dry and air is humid
D. Both soil and air are dry.
Answer : Option C
100. Stomata of CAM plants
A. Are always open
B. Open during the day and close at might
C. Open during night and close during the day
D. Nerve open
Answer : Option C