NEET Biology Transport In Plants Based Practice Questions & Answers with Viewers Discussion and Detailed Explanation

Transport In Plants Topic Based

Question & Answer Discuss:

The most widely accepted theory for ascent of sap in trees is

(a) pulsating action of living cell

(b) role of atmospheric pressure

(c) capillarity

(d) transpiration pull and cohesion theory of Dixon and Jolly.

Answer: (d)

Transpiration pull cohesion theory for ascent of sap in trees is most widely accepted. This concept was proposed by Dixon and Jolly, 1884. It is based up on three basic assumptions which are cohesion in between water molecules, continuity of water column and transpiration pull.

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