You are given two pieces of old dicot stem an | vedclass

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(C) In dicot stems and roots,secondary growth occurs,which makes them look similar in older stages. However,the arrangement of $Protoxylem$ remains a

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Protoxylem

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(C) In dicot stems and roots,secondary growth occurs,which makes them look similar in older stages. However,the arrangement of $Protoxylem$ remains a diagnostic feature. In the dicot stem,the $Protoxylem$ is located towards the center (endarch condition),whereas in the dicot root,the $Protoxylem$ is located towards the periphery (exarch condition). This difference persists even after secondary growth,making it the most reliable feature to distinguish between the two.

You are given two pieces of old dicot stem and root. Which of the following anatomical features will be useful to distinguish between them?

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