Multiple Choice QuestionsIn plants, water supply is due to
osmosis
imbibition
guttation
adhesion force
D.
adhesion force
Adhesion force is the force between walls and water.
Osmosis is the diffusion of water from its pure or dilute solution into a stronger solution when the two are seperated by a semi- permeable membrane.
Imbibition is the absorption of water by the solid particles of an adsorbant without forming a solution.
Guttation is the loss of water in the form of liquid droplets from the leaves and other parts of an uninjured or intact plant.
Most accepted theory for ascent of sap is
capillary theory
root pressure theory
pulsation theory
transpiration pull
Which of the following theory gives the latest explanation for the closure of stomata?
ABA theory
Munch Theory
Starch glucose theory
Active K+ transport theory
Transpiration would be lowest when
wind velocity is high
enough water is in the soil
atmospheric RH is high
high temperature and light
Which of the following exhibits a direct porportionality to transpiration
Light and RH
Temperature and RH
Temperature and wind
RH and wind
The most important force which pulls water up in tall trees is
imbibition force
osmotic force
cohesive force
electromagnetic force
The light phase of photosynthesis is called
Hill reaction
photo action
pigment action
chlorophyllous process
Switch
