The transport of water in plants occurs by the process of ______
transpiration
ascent of sap
guttation
none of these
Ascent of sap in higher plant takes place through,
Xylem
Phloem
Parenchyma
None of these
The ascent of sap in plants takes place due to
root pressure
transpiration pull
both a and b
osmosis
Stomata are present on the __________ of the leaves.
upper surface only
lower surface only
mostly upper surface
mostly lower surface
Most of the transpiration takes place through
stomata
lenticels
cuticle
epidermis
Which one of the following plants is the tallest angiosperm?
Sequoia sempervirens
Australian Eucalyptus
Ficus bengalensis
Pine tree
Cohesive force of water is due to presence of,
Hydrogen bonds between water molecules
Covalent bonds between water molecules
Hydrogen bonds between water and components of xylem walls
Stomata open and close due to
presence of valves
hormonal control
turgor pressure of guard cells
concentration gradient of the gases
Transpiration pull and cohesion of water theory of ascent of sap was first proposed by,
Dixon
Jolley
Dixon and Jolley
Sachs
Main force for ascent of sap in higher plants is
Root pressure
Transpiration pull
Atmospheric pressure
Capillary force
