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  4. Assertion: Phloem fibres or bast fibres are made up of collenchymatous cells. Reason: Phloem fibres are generally found in primary pholem.

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Q. Assertion : Phloem fibres or bast fibres are made up of collenchymatous cells.
Reason : Phloem fibres are generally found in primary pholem.

Anatomy of Flowering Plants

Solution:

Sclerenchyma fibres found in the phloem are called phloem or bast fibres. Phloem fibres are made up of sclerenchymatous cells. They are generally absent in primary phloem but are quite common in secondary phloem.