Transport of food material in higher plants takes place through

Which of the following is the main point in disfavour of the Munch theory?

The improvements so proposed in pressure flow are

Intensity of light required for the translocation of sugar as compared to photosynthesis is:

Explain the pressure flow hypothesis of translocation of sugar in plants.

Assertion : Long distance flow of photoassimilates in plants occurs through sieve tubes.
Reason : Mature sieve tubes have parietal cytoplasm and perforated sieve plates.