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In conifers fibres are likely to be abse...

In conifers fibres are likely to be absent in

A

secondary phloem

B

secondary xylem

C

prmary phloem

D

leaves

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The correct Answer is:
B

Fibres occur in all those parts where mechanical strength is required i.e., leaces, petioles, cortex, xylem, phloem, etc. In confifers, they are likely to be absent in secondary xylem.
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NCERT FINGERTIPS-ANATOMY OF FLOWERING PLANTS-Anatomy Of Flowering Plants
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  13. Assertion: Phloem fibers or bast fibers are made up of collenchymatous...

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