“Sap wood” is otherwise called
Duramen
Alburnum
Pith
Medullary rays
$I.$ 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?
Wood is
Which of the following meristems is responsible for extrastelar secondary growth in dicotyledonous stem
Tissue present in an annual ring is
Besides phellem, phellogen, root periderm comprises of