$I.$ 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 the given diagram of lenticel, label $A, B, C$ in the given option
Bulliform cells are the modification of
The organisation of the shoot apex into tunica and corpus is determined largely on the basis of