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  • Which of the following is completely secondary in origin?Option: 1 PhellogenOption: 2 Root

Which of the following is completely secondary in origin?

Option: 1

Phellogen


Option: 2

Root cambium


Option: 3

Both a and b


Option: 4

None of these


Answers (1)

 

Secondary Growth in Dicot Roots

  • In the dicot root, the vascular cambium is completely secondary in origin. 
  • It originates from the tissue located just below the phloem bundles, a portion of pericycle tissue, above the protoxylem forming a complete and continuous wavy ring, which later becomes circular.
  • Further events are similar to those already described above for a dicotyledon stem.

 

Both the phellogen and root vascular cambium are secondary in origin.

Posted by

Kshitij

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