The interfibrillar material of the secondary wall is chiefly made up of
Function of storage is performed by
Given below are two statements :
Statement $I:$ Endarch and exarch are the terms often used for describing the position of secondary xylem in the plant body.
Statement $II:$ Exarch condition is the most common feature of the root system.
In the light of the above statements, choose the correct answer from the options given below:
The first formed primary phloem is referred as ...$A$... The later formed primary phloem is referred as ...$B$...
Choose the correct combination of $A$ and $B$