Question

In the diagram of section of root of maize, different parts have been indicated by alphabets. Choose the correct answer.

• A. A- Phloem, B- Xylem, C- Cortex, D- Endodermis, E- Pith, F- Root hair, G- Epidermis
• B. A- Pith, B- Root hair, C- Epiblema, D- Cork, D- Cortex, E- Endodermis, F- Phloem, G- Xylem
• C. A- Root hair, B- Epiblema, C- Cortex, D- Endodermis, E- Pith, F- Xylem, G- Phloem
• D. A- Epiblema, B- Root hair, C- Vascular bundle, D- Cortex, E- Phloem, F- Xylem, G- Pith

Answer 1

The correct option is C A- Root hair, B- Epiblema, C- Cortex, D- Endodermis, E- Pith, F- Xylem, G- Phloem

The outer most layer of monocot root is rhizodermis/epidermis (B) which has compactly arranged tubular cells and unicellular root hair (A) as their extension. Just beneath the epidermis are multiple layers of parenchymatous cells with ample intercellular space, it is cortex (C). The inner most layer of cortex forms endodermis (D) which has compactly arranged barrel shaped cells with casparian strips at their anticlinal wall. The uniseriate layer of thin walled parenchymatous cells, present below endodermis, which are sclerified in old roots makes pericycle. The vascular bundles are present as alternating strands of xylem and phloem, the discrete xylem strands (F) alternated with phloem strands (G). The central parenchymatous or sclerenchymatous cells form pith (E).

Therefore, the correct answer is option C.