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Need clarity, kindly explain! Secodary xylem and phloem in dicot stem are produced by

Secodary xylem and phloem in dicot stem are produced by

  • Option 1)

    Phellogen

  • Option 2)

    Vascular cambium

  • Option 3)

    Apical meristems

  • Option 4)

    Axillary meristems

 
Answers (2)
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As we learnt in

Differentiation of vascular tissue in pteridophyta -

In xylem, true vessel are absent, tracheids  present.

In phloem, companion cell and sieve tubes are absent, instead sieve cell are present.

-

The vascular cambium is the main growth layer in the stems and roots of many plants, specifically in dicots. It produces xylem on the inside and phloem on the outside.

 


Option 1)

Phellogen

This is incorrect.

Option 2)

Vascular cambium

This is correct.

Option 3)

Apical meristems

This is incorrect.

Option 4)

Axillary meristems

This is incorrect.

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