The xylem which has protoxylem is inside and metaxylem is outside 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 A Endarch In Endarch condition the development of protoxylem from innermost procambial cells adjacent to pith that is present in the stem. In Exarch condition the development of protoxylem from the outermost edge of procambial cells and is present towards the periphery. In Mesarch condition the development of protoxylem from the center as well as periphery in which younger cells surrounded by old cells. So the correct option is 'Endarch'