Mass flow hypothesis was first described by

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

Match Column-$I$ with Column-$II$.

Column-$I$	Column-$II$
$i$. Radial translocation	$a$. Translocation of food from phloem to cortex
$ii$. Tangential translocation	$b$. Translocation of food from phloem to pith
$iii$. Longitudinal translocation	$c$. Translocation of food from source to sink

Although starch is insoluble in water,it is stored in large quantities in potatoes. Why?

Which of the following is responsible for changing the direction of the source and sink in plants?

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