Cork tissue arises from
Periderm
Phellogen
Pelloderm
Phellem
$A$ : Complementary cells are cut-off by phellogen towards outside.
$R$ : Phellogen is partially secondary in origin.
In a stratified cambium, the fusiform initials are
Articulated laticifers or latex vessels are prominent in
In which of the following situations an intercalary meristem can be present
$T.S.$ of stem of Cucurbita can be identified from the $T.S.$ of sunflower stem by the presence of