In flowering plants,in what form is sugar translocated?

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

By which of the following techniques can we prove that phloem is the tissue responsible for food translocation?

If you are given a task to analyse phloem sap chemical,which of the following will be present in least concentration?

Explain: The relationship between source and sink is variable.

Which of the following statements is correct regarding the transport of substances in plants?