Question

Mass-flow hypothesis is also known as

• A. Pressure flow hypothesis
• B. Accelerated diffusion theory
• C. Conventional flow hypothesis
• D. All of the above

Answer 1

The correct option is A Pressure flow hypothesis

Mass flow hypothesis is also known as pressure flow hypothesis. This theory was proposed by Ernst Munch. According to this theory, movement of sap through the phloem occurs by mass flow from sugar-rich area to sugar-deprived area. Sugar molecules produced by the process of photosynthesis moves from leaves into the phloem cells through active transport.

Thus, the correct answer is option A.