CBSE
Multiple Choice QuestionsThe most important force which pulls water up in tall trees is
imbibition force
osmotic force
cohesive force
electromagnetic force
Root hair absorbs water from soil through
turgor pressure
ion exchange
osmosis
DPD
The light phase of photosynthesis is called
Hill reaction
photo action
pigment action
chlorophyllous process
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
Most accepted theory for ascent of sap is
capillary theory
root pressure theory
pulsation theory
transpiration pull
In plants, water supply is due to
osmosis
imbibition
guttation
adhesion force
Who said that 'transpiration is a necessary evil'
Curtis
Andersen
Steward
J.C. Bose
Water in plants is transported by
cambium
phloem
xylem
epidermis
