The movement of water from one cell of the cortex to the adjacent one in roots is due to
accumulation of inorganic salts in the cells
accumulation of organic compounds in the cells
chemical potential gradient
water potential gradient
Which of the following is used to determine the rate of transpiration in plants ?
Porometer
Potometer
Auxanometer
Tensiometer
Glycolate induces opening of stomata in
presence of oxygen
low CO2 concentration
high CO2 concentration
absence of CO2
The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of
lignified thick walls
cohesion and adhesion
weak gravitational pull
transpiration pull
In which of the following plant sunken stomata are found ?
Neriumspp
Hydrillaspp
Mango
Guava
Basis of stomatal opening is
exosmosis
endosmosis
decrease in cell sap concentration
plasmolysis of guard cells
Which of the following is an effective adaptation for better gas exchange in plants ?
Presence of multiple epidermis
Presence of hair on the lower epidermis
Presence of waxy cuticle covering the epidermis of the leaves
The location of the stomata primarily on the lower surface of the leaf, the side turned away from the direct sun rays.
Conversion of starch to organic acid is essential for
stomatal closure
stomatal opening
stomatal initiation
stomatal growth
Osmotic pressure in the leaf cells is positive during
excessive transpiration
low transpiration
excessive absorption
guttation
Root system in a plant is well developed
due to deficiency of auxins
due to deficiency of cytokinins
due to deficiency of minerals
for increased absorption of water
