Ppz explai. With a diagram
Dear student,
Please find below the solution to the asked query
Whenever we want to distinguish between stem and root, we should look for position of protoxylem. In roots, the position of protoxylem is exarch (protoxylem towards periphery, metaxylem towards center) while in stem it is endarch (protoxylem towards center and metaxylem towards periphery).
Hence, option (3) is correct.
Diagram of Dicot root:
![](https://s3mn.mnimgs.com/img/shared/content_ck_images/ck_59912ef897166.jpg)
Diagram of dicot stem:
![](https://s3mn.mnimgs.com/img/shared/content_ck_images/ck_59912f15da506.jpg)
Hope this information will clear your doubts about the topic.
Please find below the solution to the asked query
Whenever we want to distinguish between stem and root, we should look for position of protoxylem. In roots, the position of protoxylem is exarch (protoxylem towards periphery, metaxylem towards center) while in stem it is endarch (protoxylem towards center and metaxylem towards periphery).
Hence, option (3) is correct.
Diagram of Dicot root:
![](https://s3mn.mnimgs.com/img/shared/content_ck_images/ck_59912ef897166.jpg)
Diagram of dicot stem:
![](https://s3mn.mnimgs.com/img/shared/content_ck_images/ck_59912f15da506.jpg)
Hope this information will clear your doubts about the topic.
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Regards