Question
Biology Question on Anatomy of Flowering Plants
In the following pairs, where do you get lignin in both the element?
A
Tracheid and collenchyma
B
Sclerenchyma and sieve tube
C
Sclerenchyma and trachea
D
Parenchyma and endodennis
Answer
Sclerenchyma and trachea
Explanation
Solution
The cells of sclerenchyma are long or short, narrow, thick walled and lignified. These are dead cells and do not perform any metabolic function. Tracheids (tracheary element) are elongated cells with tapering ends. The wall of tracheids is moderady thick and usually lignified.