Question

In the diagram of the portion of the transverse section of maize root given, certain parts have been indicated by alphabets, choose the answer in which these alphabets have been correctly matched with the parts which they indicate.

• A. A- Root hair, B- Epiblema, C- Cortex, D- Endodermis, E- Passage cell, F- Pericycle, G- Pith, H- Phloem, I- Metaxylem, J- Protoxylem
• B. A- Root hair, B- Epiblema, C- Cortex, D- Endodermis, E- Passage cell, F- Pith, G- Pericycle, H- Metaxylem, I- Phloem, J- Protoxylem
• C. A- Root hair, B- Epiblema, C- Cortex, D- Endodormis, E- Pericycle, F- Passage cell, G- Phloem, H- Pith, I- Protoxylem, J- Metaxylem
• D. A- Root hair, B- Cortex, C- Epiblema, D- Pericycle, E- Endodermis, F- Pith, G- Passage cell, H- Phloem, I- Protoxylem, J- Metaxylem

Answer 1

The correct option is A A- Root hair, B- Epiblema, C- Cortex, D- Endodermis, E- Passage cell, F- Pericycle, G- Pith, H- Phloem, I- Metaxylem, J- Protoxylem

Maize is a monocot. Hence, given cross section is of a monocotelydonous root.
A is showing root hair like structure. Some epidermal cells protrude to give unicellular root hairs. Hence, A- Root hair.
B is showing outermost epidermis layer It is called as epiblema, Hence, B- Epiblema.
C is showing loosely spaced parenchymatous cells. Hence, C- Cortex.
D consists of barrel shaped cells. Hence, D- Endodermis.
E is showing some of the cells of endodermis without thickening. Hence, E- Passage cell.
F is a single layer of cells below endoermis, Hence, F- Pericycle.
Monocot root shows well developed, large central pith. Hence, G- Pith.
Vascular bundles of monocot root are are radial, i.e., present at different radii, xylem is exarch, i.e., protoxylem is away from centre and metaxylem is towards center. H- Phloem, I- Metaxylem, J- Protoxylem.
Thus, the correct answer is option A.