Question

In a transverse section of a sunflower root:

• A. Both protoxylem and metaxylem vessels are present towards the periphery.
• B. Both protoxylem and metaxylem vessels are present towards the centre.
• C. The protoxylem vessels are present towards the centre and metaxylem vessels are present towards the periphery.
• D. The protoxylem vessels are present towards the periphery and metaxylem vessels are present towards the centre.

Answer 1

Answer: (D)

In a transverse section of a Sunflower root, Vascular bundles are described as radial and tetrarch. There are four bundles each of xylem and phloem occurring alternately and Xylem is exarch type. (In roots, the protoxylem lies towards periphery and metaxylem lies towards the centre. Such arrangement of primary xylem is called exarch).