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.
$II, III$ and $IV$
$I$ and $IV$
$II$ and $IV$
$I, II$ and $III$
$A$ : Intercalary meristems are commonly located at the base of leaves, above the nodes or below the nodes.
$R$ : Vacuoles are large sized in the cells of intercalary meristem.
Desert grasses often roll their leaves due to presence of
Give differences: Heartwood and Sapwood
Heart wood and sapwood of dicot plants are respectively, called as