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Question
Inverted omega shaped arrangement of vascular bundles is found in
Inverted omega shaped arrangement of vascular bundles is found in
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Solution
The correct option is C Cycas rachis
The vascular bundles in rachis are arranged in an inverted omega shaped manner and vary in their structure at the base (endarch) centre (pseudomesarch) and apex of rachis (exarch). Endarch is when there is more than one strand of primary xylem in a stem or root, and the xylem develops from the outside inwards towards the center, i.e., centripetally. Exarch is when there is more than one strand of primary xylem in a stem or root, and the xylem develops from the inside outwards towards the periphery, i.e., centrifugally.
So, the correct answer is 'Cycas rachis'
The vascular bundles in rachis are arranged in an inverted omega shaped manner and vary in their structure at the base (endarch) centre (pseudomesarch) and apex of rachis (exarch). Endarch is when there is more than one strand of primary xylem in a stem or root, and the xylem develops from the outside inwards towards the center, i.e., centripetally. Exarch is when there is more than one strand of primary xylem in a stem or root, and the xylem develops from the inside outwards towards the periphery, i.e., centrifugally.
So, the correct answer is 'Cycas rachis'
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