Guttation is caused by
transpiration
osmosis
root pressure
osmotic pressure
Special pore - bearing structures called _______ are present on the leaf margins for exudation.
stomata
ostia
hydathodes
none of these
The most effective method of elimination of excess of water from the plant body is by
evaporation
guttation
all of the above
Maximum transpiration occurs through the
stem
root
flowers
leaves
Water and salts move from one cell to the next cell by
absorption
Diffusion
Adhesive and cohesive forces are
physical forces
chemical forces
electrical forces
magnetic forces
The rate of transpiration will ________ with the decreases in atmospheric pressure.
increase
decrease slowly
decrease rapidly
none of the above
Strong attraction of water molecules to xylem walls is called
cohesion
adhesion
both a and b
"The openings on the stem through which transpiration occurs"
lenticels
Strong attraction between water molecules is called
Adhesive
Ascent of sap
Cohesion
Osmosis