Problem 113
Out of the following, which one is the most common type of transpiration? (a) Foliar (b) Stomatal (c) Lenticular (d) Cuticular
Problem 114
In a hot summer day, a plant cools itself due to (a) Loss of water vapours from leaf (b) Transport of water in plant (c) Loss of liquid water (d) Loss of water from entire plant
Problem 115
Guard cells are surrounded by (a) Epidermal hairs (b) Mesophyll cells (c) Palisade cells (d) Subsidiary cells
Problem 116
Which of the following is an adaptation to reduce water loss? (a) Presence of thick cuticle (b) Change of leaf into spine (c) Change of leaf into phylloclade (d) All of these
Problem 118
Which of the following plants economizes the transpirational loss of water? (a) \(C_{3}\) (b) \(C_{4}\) (c) Both equally (d) \(C_{2}\)
Problem 119
The condition under which transpiration would be most rapid is (a) High humidity (b) Excess of water in soil (c) Low humidity, high temperature, guard cells are turgid (open) and moist soil (d) Low velocity of wind
Problem 120
The transpiration in plants will be the lowest (a) When there is high humidity in the atmosphere (b) High wind velocity (c) There is excess of water in the cell (d) Environmental conditions are very dry
Problem 121
Under what conditions the rate of transpiration increases? (a) Increase of humidity (b) Increase of atmospheric pressure (c) Decrease of temperature (d) Decrease of humidity
Problem 122
Transpiration increases with an increase in (a) Humidity (b) Temperature (c) Minerals (d) Soil moisture
Problem 123
Stomata in angiosperms open and close due to (a) Their genetic constitution (b) Effect of hormones (c) Changes of turgor pressure in guard cells (d) Pressure of gases inside the leaves
