During translocation of food,at the sink end (root cells),the sugar is used and excess water . . . . . . .

Who suggested that the transcellular strands are made up of protein?

Arrange the following events of mass flow of organic material in sequence:
$I$. Sugars are transported from cell to cell in the leaf
$II$. Food is synthesized in form of glucose by leaf cells
$III$. Movement of water takes place into sieve tube elements
$IV$. Downward movement of sugar occurs in the stem
$V$. Solutes are actively transported into the sieve elements

When a plant is girdled,what happens?

Explain the mass flow hypothesis of transport in phloem.

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