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  • In a dicot stem the position of youngest layer of secondary xylem is:  Option: 1 Inner to vascular cambium<div class='qn

In a dicot stem the position of youngest layer of secondary xylem is:

 

Option: 1

Inner to vascular cambium


Option: 2

Just outside phellogen


Option: 3

Just inside phellogen


Option: 4

Between secondary xylem and primary cortex


Answers (1)

best_answer

In the stems of dicotyledonous trees growing temperate regions, during secondary growth, vascular cambial ring produces secondary phloem towards the outer side and secondary xylem towards inner side.  When secondary growth is going on, old secondary xylems are pushed towards the center, and young secondary xylems are present nearer to the vascular cambial ring or just inner to the vascular cambial ring. Hence, the correct answer is option 1.

 

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