Question

Choose the correct combination of labelling a lenticel.

• A. a - Pore, b - Secondary cortex, c - Cork cambium, d - Cork, e - Complimentary cells
• B. a - Pore, b - Cork cambium, c - Secondary cortex, d - Cork, e - Complimentary cells
• C. a - Pore, b - Cork, c - Complimentary cells, d - Cork cambium, e - Secondary cortex
• D. a - Pore, b - Complimentary cells, c - Cork, d - Cork cambium, e - Secondary cortex

Answer 1

The correct option is D a - Pore, b - Complimentary cells, c - Cork, d - Cork cambium, e - Secondary cortex

Lenticels are formed on plant stems. These are pore-like opening present on the tree trunk. They are involved in gaseous exchange.
Label a shows the opening like structure. Hence, it is the pore of the lenticel.
Label b shows the oval, loosely arranged cells which are present in different planes. All these loosely arranged cells are collectively known as complementary cells.
Label c is showing the rectangular shaped cells without any intercellular spaces. These cells are cork cells or phellem. They are formed from cork cambium.
Label d shows narrow and nearly rectangular cells. It is called as cork cambium or phellogen.
Label e shows oval, loosely arranged cells. This region is secondary cortex or phelloderm. It is made of parenchymatous cells.
Thus, the correct answer is option D.