Commercial cork is obtained from
Mango
Oak $(Quercus\ suber)$
Ficus religiosa
Pinus
In which of the following, there is no differentiation of bark, sap wood and heart wood
The presence of cambium in the vascular bundles provides them the ability to
Age of a tree can be estimated by :
Anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous stem by
Which one of the following has least influence on cell elongation in a meristem