In the leaf vascular bundles are found in the
Veins
Palisade tissue
Lower epidermis
Upper epidermis
In a plant organ which is covered by periderm and in which the stomata are absent, some gaseous exchange still takes place through
Besides phellem, phellogen, root periderm comprises of
In an annual ring, the light coloured part is known as
Which of the following statements about cork cambium is incorrect?