Question

The theoretical explanation for how sugars and other food materials are transported through the phloem tissue of a plant — based on a pressure gradient created by differences in osmotic pressure between the source (where sugars are produced) and the sink (where sugars are consumed or stored) — is widely known as the mass flow or pressure flow theory. Which scientist originally proposed this theory?

A Otto Warburg
B Emerson and Lewis
C T.D. Lysenko
D M. Chailakyan
E Munch
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