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Question

The xylem which has metaxylem towards the centre and protoxylem is present towards the periphery is known as

A
Endarch
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B
Mesarch
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C
Exarch
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D
None of the above
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Solution

The correct option is B Exarch
A)Endarch condition consists of the development of protoxylem from innermost procambial cells adjacent to pith that is present in a stem.
B)Exarch condition is characterized by the development of protoxylem from the outermost edge of procambial cells and is present towards the periphery.
C)A mesarch condition is characterized by the development of protoxylem from the center as well as periphery in which younger cells surrounded by old cells.
So the correct option is 'Exarch'

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