(A) The root of $Pteridium$ (a fern) exhibits a protostele. The xylem is $diarch$ (having two xylem poles) and $exarch$ (protoxylem is located towards

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(A) The root of $Pteridium$ (a fern) exhibits a protostele. The xylem is $diarch$ (having two xylem poles) and $exarch$ (protoxylem is located towards the periphery,while metaxylem is towards the center). There are two phloem groups that alternate with the protoxylem poles.