Transpiration pull and cohesion of water theory of ascent of sap was first proposed by,
Dixon
Jolley
Dixon and Jolley
Sachs
Water rises in xylem in the form of __________
Continuous water column
Discontinuous water column
Water vapours
None of these
Main force for ascent of sap in higher plants is,
Root pressure
Transpiration pull
Atmospheric pressure
Capillary force
High root pressure can cause water to be lost by leaves through the process of
transpiration
guttation
translocation
Which one of the following plants is the tallest angiosperm?
Sequoia sempervirens
Australian Eucalyptus
Ficus bengalensis
Ascent of sap in higher plant takes place through,
Xylem
Phloem
Parenchyma
_________ 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
none of these
Much of the transpiration takes place through ___________.
stomata
lenticels
cuticle
epidermis
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
