Root pressure is a

Indicate the correct statements: (i)Roots pressure is absent in gymnosperms (ii)Roots pressure in totally absent in angiosperms (iii)There is a relationship between the ascent of sap and root pressure. (iv)There is no relationship between the ascent of sap and root pressure.

Root pressure is caused by:

Root pressure is maximum when ..................

Root pressure is maximum when :

Root pressure is maximum when

Root pressure is maximum when :

Root pressure is maximum when

Root pressure is maximum when

Root pressure is maximum at the time of