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Which is the most accepted mechanism for the translocation of sugars from source to sink?

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in Biology – Class 11 by (272k points)
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) Imbibition

This 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

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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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