Ascent of sap in higher plant takes place through,
Xylem
Phloem
Parenchyma
None of these
Root pressure can be measured by,
Ganong's potometer
Psychrometer
Mercury Manometer
All of above
Stomata open and close due to
presence of valves
hormonal control
turgor pressure of guard cells
concentration gradient of the gases
Which of the following scientists gave vital theories of ascent of sap in plants?
Godlewski
Strasburger
Bose
All the above
High root pressure can cause water to be lost by leaves through the process of
transpiration
guttation
translocation
osmosis
Main force for ascent of sap in higher plants is
Root pressure
Transpiration pull
Atmospheric pressure
Capillary force
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
_________ and _________ are non living plant tissues which help in conducting water and minerals dissolved in water from roots to upper parts of the plant.
Xylem vessels, Tracheids
Pholem vessels, Sieve tubes
Aerenchyma , Sclerenchyma
Collenchyma and Parenchyma
Transpiration pull and cohesion of water theory of ascent of sap was first proposed by,
Dixon
Jolley
Dixon and Jolley
Sachs
