Opening of the leaf through which transpiration occurs is called
stomata
ostia
clotting
guttation
In which condition the transpiration pull is maximum?
Open stoma, dry atmosphere and moist soil
closed stomata, dry atmosphere and moist soil
closed stoma, dry atmosphere
open stoma, high humid atmosphere and dry soil
Special pore - bearing structures called _______ are present on the leaf margins for exudation.
hydathodes
none of these
Guard cells help in
protection against grazing
transpiration
fighting against infection
Maximum transpiration occurs through the
stem
root
flowers
leaves
The rate of transpiration will be very less in a situation where
ground water is sufficient
wind is blowing
hot and dry environment
relative humidity is high
Adhesive and cohesive forces are
physical forces
chemical forces
electrical forces
magnetic forces
Strong attraction between water molecules is called
Adhesive
Ascent of sap
Cohesion
Osmosis
Ascent of sap takes place through
xylem fibres
xylem parenchyma
xylem vessels
From root hairs water and salts pass into epidermal cells _______ cells, endodermis and finally into xylem.
guard cells
cortical
phloem
