Which tissue gives rise to secondary growth?
Apical meristem
Adventitious roots
Germinating seed
Vascular cambium
What is/are true about heartwood?
$I.$ It does not help in water conduction.
$II.$ It is also called alburnum.
$III.$ It is dark in colour but very soft.
$IV.$ It has tracheary elements, which are filled with tannin, resin, etc.
The intrafascicular cambium
Periderm is produced from
The tissue which participates in the secondary growth is
Besides phellem, phellogen, root periderm comprises of