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(A) The protoplasmic streaming theory, proposed by $de 	ext{ } Vries$, suggests that the movement of solutes occurs through the streaming movement of

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Diffusion

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(A) The protoplasmic streaming theory, proposed by $de 	ext{ } Vries$, suggests that the movement of solutes occurs through the streaming movement of the cytoplasm within the sieve tube elements. This cytoplasmic streaming facilitates the transport of sugars from one sieve tube element to the next through the sieve pores. However, it is important to note that the currently accepted mechanism for sugar translocation in plants is the $Munch$ Pressure Flow Hypothesis, which relies on active transport and osmosis.

According to the protoplasmic streaming theory, how is sugar translocated from one sieve tube to another?

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