Capillarity

Which of the following statement are not true? (a) In CAM plants, stomata open during dark and remain closed during the day. (b) Role of Na^(+) in stomatal opening is now universally accepted. (c) Water potential of root cells is higher than water potential of soil. (d) Capillarity theory most accepted theory of water movement through plants. (e) Wall of xylem vessels made up of lignocelluloes has strong affinity for water molecules.

Which of the following statement is/are not true (A). In CAM plants stomata open during dark and remain closed during the day (B). Role of Na^(+) in stomatal opening in now universally accepted (C). The water potential of roots cells is higher than the water potential of soil (D). Capillarity theory is the most accepted thory of water movement through plants. (E). The walls of xylem vessels made up of ligno-cellulose have strong affinity for water molecules

The sap in tree rises in a system of capillaries of radius 2.5 xx 10^(-2) N m^(-1) and the angle of contact is 0^(@) . The maximum height to which sap can rise in tree through capillarity action is (rho_("sap")=10^(3) kg m^(-3))