Which of the following are responsible for ascent of sap?
Which of the following are responsible for ascent of sap?
The correct options are
A Root pressure
B Transpirational pull
C Capillary force
D Cohesion and adhesion of water
The ascent of sap in the xylem tissue of plants is the upward movement of water and minerals from the root to the crown. Evaporation of water molecules from the cells of a leaf creates a suction which pulls water from the xylem cells of roots. Thus, transpiration helps in the absorption and upward movement of water and minerals dissolved in it from roots to the leaves. Root pressure is the transverse osmotic pressure within the cells of a root system that causes sap to rise through a plant stem to the leaves. The cohesion-tension theory is a theory of intermolecular attraction that explains the process of water flow upwards (against the force of gravity) through the xylem of plants.
A
Root pressure
B
Transpirational pull
C
Capillary force
D
Cohesion and adhesion of water
The ascent of sap in the xylem tissue of plants is the upward movement of water and minerals from the root to the crown. Evaporation of water molecules from the cells of a leaf creates a suction which pulls water from the xylem cells of roots. Thus, transpiration helps in the absorption and upward movement of water and minerals dissolved in it from roots to the leaves. Root pressure is the transverse osmotic pressure within the cells of a root system that causes sap to rise through a plant stem to the leaves. The cohesion-tension theory is a theory of intermolecular attraction that explains the process of water flow upwards (against the force of gravity) through the xylem of plants.
