Stomata of a plant open due to
influx of hydrogen ions
influx of calcium ions
influx of potassium ions
efflux of potassium ions
An innovative professor who wanted to give a live demonstration of a physiological process, filled a glass bottle with previously moistened mustard seeds and water. He screwcapped the bottle and kept it away in a corner and resumed his lecture. Towards the end of his lecture there was a sudden explosion with glass pieces of bottle thrown around. Which of the following phenomena did the professor want to demonstrate ?
Diffusion
Osmosis
Anaerobic respiration
Imbibition
In which of the following plant sunken stomata are found ?
Neriumspp
Hydrillaspp
Mango
Guava
Opening and closing of stomata is due to
hormonal change in guard cells
change in turgor pressure of guard cells
gaseous exchange
respiration
Basis of stomatal opening is
exosmosis
endosmosis
decrease in cell sap concentration
plasmolysis of guard cells
Glycolate induces opening of stomata in
presence of oxygen
low CO2 concentration
high CO2 concentration
absence of CO2
If turgidity of a cell surrounded by water increases, the wall pressure will
increase
decrease
fluctuate
remain unchanged
Water enters a cell due to
OP
SP
TP
WP
Stomata in angiosperms open and close due to
their genetic constitution
effect of hormones
change of turgor pressure in guard cells
pressure of gases inside the leaves
Some of the growth regulators affect stomatal opening. Closure of stomata is brought about by
indole butyric acid
abscisic acid
kinetin
gibberellic acid
