Which of the following statements about cork cambium is incorrect?
It is a couple of layers thick
It forms secondary cortex on its outerside
It forms a part of periderm
It is responsible for the formation of lenticels
Vascular bundle with cambium is called
Periderm is made up of
Initiation of lateral roots and vascular cambium during secondary growth takes place in cells of :
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.