Which of the following tissues originate from ray initials of a cambium
Vascular rays
Tracheids and vessels
Xylem and phloem fibres
Sieve tube and companion cells
$I.$ It is resistant to microorganisms
$II.$ It comprises dead elements
$III.$ It comprises highly lignified cell wall
$IV.$ It is the peripheral part
$V.$ It is dark and tough
Which of the above property doesn't belongs to heart wood?
In cambium, amount of secondary xylem produced is more than secondary pholen because..........
Lenticels are formed in bark, which are
Meristematic tissue in vascular bundle is