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Question
In a vascular bundle, if xylem vessels develop in a centripetal fashion, the xylem is likely to be
In a vascular bundle, if xylem vessels develop in a centripetal fashion, the xylem is likely to be
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Solution
The correct option is C Exarch
In exarch condition, the protoxylem is found outside the metaxylem. Each xylem strand develops inward towards the centre and is thus centripetal in development. When the xylem develops in multiple strands and each strand develops outward towards the periphery of stem, iot is known as endarch condition. This is known as centrifugal manner of arrangement. In mesarch condition, each strand develops from its middle both towards the centre of stem and in the opposite direction towards the periphery. Xylem in leaves develop in this way. In centrarch condition, xylem forms one chamber in the middle of stem with metaxylem surrounding the protoxylem. This is not found in any living plants. Thus, the correct answer is option B.
In exarch condition, the protoxylem is found outside the metaxylem. Each xylem strand develops inward towards the centre and is thus centripetal in development.
When the xylem develops in multiple strands and each strand develops outward towards the periphery of stem, iot is known as endarch condition. This is known as centrifugal manner of arrangement.
In mesarch condition, each strand develops from its middle both towards the centre of stem and in the opposite direction towards the periphery. Xylem in leaves develop in this way.
In centrarch condition, xylem forms one chamber in the middle of stem with metaxylem surrounding the protoxylem. This is not found in any living plants.
Thus, the correct answer is option B.
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