Question

hardness of secondary wood is mainly due to​

Answer 1

Hardness of secondary wood is mainly due to Lignin

Answer 2

Lignin is the correct answer.

1. Lignin is a hydrophobic polymer commonly found in the plant cell wall. It is dead and provides structural supports and strength.
2. Benefits of lignin other than providing hardness are protection from environmental or abiotic factors thus resistance to stresses.
3. Lignin also provides protection form biotic factors like pests and pathogens.
4. Moreover, it promotes transportation of minerals through vascular bundles.