The xylem fibres are classified into
Protoxylem and metaxylem
Primary and secondary fibres
Fibre tracheids and fibres
Long and short fibres
Which one of the following is an effective tissue of growing organs with sufficient elasticity
Companion cells in plants are associated with
Collenchymatous tissue is found in
$A$ : Bast fibres are collenchymatous fibres.
$R$ : Fibres are absent in secondary phloem.