It is not a part of tissue which is responsible for the conduction of water and minerals from roots to the stem and leaves.
Tracheid
Companion cells
Vessels
Xylem fibre
All xylem elements when mature are dead except
Given below are two statements:
Statement $I$: Parenchyma is living but collenchyma is dead tissue.
Statement $II$ : Gymnosperms lack xylem vessels but presence of xylem vessels is the characteristic of angiosperms.
In the light of the above statements, choose the correct answer from the options given below:
$A$ : Sieve tubes and companion cells are related ontogenetically.
$R$ : Both develop from same mother cell.
Lignin is the main constituent of