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  • Need explanation for: The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is

The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is

  • Option 1)

    elongating

  • Option 2)

    widening

  • Option 3)

    differentiating

  • Option 4)

    maturing

 

Answers (1)

best_answer

 

Centrifugal or Endarch Development -

Protoxylem is formed near the central axis and metaxylem is formed away from centre (towards periphery).

- wherein

Example stem of angiosperm and gymnosperm.

 

 Vessels or tracheae are made up of a row of cells, placed one above the other, with their intervening walls absent or variously pored. The walls of vessel
are lignified and hard, but not very thick. The cell cavity or the lumen is wide. The thickening may be annular, spiral, scalariform, reticulate and pitted. 


Option 1)

elongating

This solution is incorrect 

Option 2)

widening

This solution is incorrect 

Option 3)

differentiating

This solution is incorrect 

Option 4)

maturing

This solution is correct 

Posted by

divya.saini

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