Solution

Phellem (cork) cells are dead and suberised.

Cork cambium undergoes periclinal division and cuts off thick-walled, suberised, dead cork cells (phellem) towards the outside, and thin-walled living cells, i.e. phelloderm, on the inner side.

Concept phellem-dead-cells

Anatomy of Flowering Plants in past papers

86 questions from this chapter have appeared across 26 exam years.