Which of the following is true for the dicot roots?

  • A
    Both vascular and cork cambium are responsible for the secondary growth
  • B
    Vascular cambium arises during the primary growth
  • C
    They do not show secondary growth just like monocot roots
  • D
    Cork cambium develops during the primary growth

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What is/are true about heartwood?
$I.$ It does not help in water conduction.
$II.$ It is also called alburnum.
$III.$ It is dark in colour but very soft.
$IV.$ It has tracheary elements,which are filled with tannin,resin,etc.

Duramen is present in

Diffused porous woods are characteristic of plants growing in

Cork is used as a stopper for bottles,for shock absorption,and for insulation because of:

In the dicot root,the vascular cambium originates from:

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