Question

Arrange the regions in the transverse section of the dicot root from the centre to the periphery.

• A. Epiblema, cortex, endodermis, pericycle, pith
• B. Pith, pericycle, endodermis, cortex, epiblema
• C. Pith, endodermis, pericycle, cortex, epiblema
• D. Pith, cortex, pericycle, endodermis, epiblema

Answer 1

The correct option is B Pith, pericycle, endodermis, cortex, epiblema

The regions in the transverse section of dicot root from the centre to periphery are pith, pericycle, endodermis, cortex, epiblema.

Pith is the central most region present in roots and is made up of parenchyma cells.
Pith is followed by a pericycle. The pericycle is made up of a few layers of thick-walled parenchyma cells.
Next to the pericycle is endodermis. It is the innermost layer of the cortex. It is made up of a single layer of barrel-shaped cells that have the deposition of suberin in the form of casparian strips.
Next to endodermis lies the remaining region of the cortex which is made up of several layers of thin-walled parenchyma cells.
Epiblema is the outermost layer of roots. Some cells of epiblema protrude in the form of unicellular root hairs.

Anatomy of dicot root