Question

Assertion : Libriform fibres are true fibres.
Reason : Libriform fibre develop from non-functional tracheids by reduction.

• A. Both Assertion and Reason are true and Reason is the explanation of Assertion
• B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
• C. Assertion is true but Reason is false
• D. Assertion is false but Reason is true

Answer 1

Answer: (C)

When the fibres possess very thick walls and reduced simple pits, they are known as libriform wood fibres because of their similarity to phloem fibres. Libriform wood fibres chiefly occur in woody dicotyledons. There are many transitional forms between the fibres and normal tracheids. These transitional forms are designated as fibre tracheids. A line of demarcation cannot be drawn between tracheids and fiber tracheids.