The attractive force between molecules of the same substance i.e. water which helps in movement of water from soil to upper parts of the plants?
a) transpiration
b) adhesion
c) cohesion
d) tension
Which of the following force is negative force- a force that pulls water from locations where the water potential is greater?
a) transpiration
b) adhesion
c) cohesion
d) tension
According to starch sugar theory of opening and closing of stomata, photosynthesis occurs in daylight by absorbing carbon dioxide which lowers the ……..of cell sap and pH of the guard cell is increased?
a) Na+
b) K+
c) H+
d) Cl-
Explanation: high pH favors the the activity of enzyme phosphorylase which converts starch into glucose and phosphate increasing the concentration
Which of the following ions play role in the opening and closing of stomata?
a) Na+
b) K+
c) Fe+
d) Cl-
The sugar (food) in plants is transported as……...
a) glucose
b) sucrose
c) starch
d) fructose
Opening and closing of stomata is controlled by which of the following factor/s?
a) sugar
b) potassium ions
c) pH
d) all of these
