Question

Sequence of cellular layers from the periphery towards the cortex in an old dicot stem is

• A. Epidermis, Hypodermis, Cortex, Endodermis
• B. Epidermis, Phellum, Phellogen, Phelloderm
• C. Epidermis, Hypodermis, Phellogen, Phelloderm
• D. Epidermis, Phellogen, Phellum, Epidermis

Answer 1

The correct option is B Epidermis, Phellum, Phellogen, Phelloderm

The sequence of cellular layers from the periphery towards the cortex in an old dicot stem is single layered epidermis on the outer side, followed by few layers of cork cells or phellem, a layer of cork cambium or phellogen and few layers of secondary cortex or phelloderm.

Thus, the correct answer is option B.