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Which is the most accepted mechanism for the translocation of sugars from source to sink?(a) Pressure flow hypothesis(b) Cohesion-tension theory(c) Root pressure theory(d) ImbibitionThis question was posed to me by my college director while I was bunking the class.This key question is from Phloem Transport in chapter Transport in Plants of Biology – Class 11

Answer»

Correct choice is (a) Pressure flow HYPOTHESIS

Easy explanation: Pressure flow hypothesis is the most accepted MECHANISM for the translocation of sugars from source to sink. Cohesion-tension theory EXPLAINS the PROCESS of transpiration. Root pressure theory demonstrates the movement of xylem sap. Imbibition is the reason behind emergence of seedlings out of the soil.



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