The movement of carbohydrates from the leaves of the tree to the root is primarily a function of the
Xylem
Phloem
Epidermis
Cambium
$A$ : Sieve tubes and companion cells are related ontogenetically.
$R$ : Both develop from same mother cell.
Give differences: Tracheids and Vessels
Walls of sclerenchyma are
Which of the following cells are studied during translocation of solutes?
Intraxyllary phloem may also be called