What is the position of oldest secondary phloem?
Just outside the pericycle
Just outside the vascular cambium
Just below the pericycle
Below the vascular cambium
In a stem which is covered by periderm and in which stomata are absent, gaseous exchange takes place through
In a plant organ which is covered by periderm and in which the stomata are absent, some gaseous exchange still takes place through
Grafting is not possible in monocots because they
$A$ : In monocot roots, pericycle gives rise to lateral roots and cork cambium.
$R$ : It has tetrach vascular bundles usually.