A) 1 - Epiblema, 2 - Root hair, 3 - Cortex, 4 - Endodermis, 5 - Pith, 6 - Pericycle
B) 1 - Cortex, 2 - Pith, 3 - Epiblema, 4 - Endodermis, 5 - Root hair, 6 - Pericycle ;
C) 1 - Epiblema, 2 - Endodermis, 3 - Cortex, 4 - Root hair, 5 - Pith, 6 - Pericycle
D) 1 - Cortex, 2 - Epiblema, 3 - Pith, 4 - Endodermis, 5 - Root hair, 6 - Pericycle
Correct Answer: D
Solution :
[d] In the given figure of T.S of dicot root, the parts marked as 1, 2, 3, 4, 5 and 6 are respectively cortex, epiblema, pith, endodermis, root hairs and pericycle. Dicot root consists of a single layer of epiblema which bears unicellular root hairs. Endodermis is followed by one or more layers of pericycle. Inner to pericycle lies radially arranged vascular bundles. This arrangement keeps the xylem bundles in direct contact with the outer tissue of the roots which conduct water absorbed by root hairs to the inside. Xylem is exarch.
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