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 maximum when :

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 at the time of