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Question

Vascular bundle in which the protoxylem arranged at the center?

A
Endarch
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B
Exarch
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C
Mesarch
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D
Diarch
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Solution

The correct option is C Mesarch
Endarch:- protoxylem is formed toward the centre (pith) and metaxylem is formed away from the centre (periphery). Example:- stem of Angiosperm and Gymnosperm.
Exarch:- protoxylem is formed towards the periphery and metaxylem is formed towards the centre. Ex. Roots
Mesarch:-Elements of metaxylem are formed on both sides of the elements of protoxylem.Ex. fern rhizome.
So correct answer is C (mesarch).

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