Assertion : Trasnlocation of suger from source to sink is defined as pressure flow hypothesis. Reason : Translocations of the solutes is facilitated through living phloem sieve tube cells

Assertion : Translocation of sugar from source to sink is defined as pressure flow hypothesis. Reason : Translocations of the solutes is facilitated through living phloem sieve tube cells

Assertion : Translocation of sugar from source to sink is defined as pressure flow hypothesis. Reason : Translocations of the solutes is facilitated through living phloem sieve tube cells

Study the statements (a-d) given below & select the correct option w.r.t transport in plants. (a) Transpiration pull model is the most acceptable to explain the transport of water. (b) The translocation in phloem is not explained by pressure flow hypothesis. (c) Diffusion is a slow process and is dependent on a 'living system'. (d) A C4 plant loses only half as much water as a C3 plant for the same amount of Co2 fixed.

Assertion : In phloem loading , food is transported to sink. Reason : Food is transported from source to sink.

Assertion :- Food is transported by phloem from source to sink, primarily in form of sucrose. Reason:- Sucrose is chemically inert but osmotically active.

Assertion :- Phloem translocation is bidirectional. Reason:- Source-sink relationship is variable according to season and need of plant.

Water transport from roots to leaves is explained by (a) the pressure flow theory (b) differences in source and sink solute concentrations (c) the pumping force of xylem vessels (d) the cohesion-tension theory

Assertion :- Companion cells are essential for functioning of sieve tubes. Reason :- The companion cells help in maintaining the pressure gradient in sieve tubes.

Assertion :- Companion cells are essential for functioning of sieve tubes. Reason :- The companion cells help in maintaining the pressure gradient in sieve tubes.