OBJECTIVE FORESTRY

Detailed explanation-1: -The cellulose molecules provide tensile strength to the primary cell wall.

Detailed explanation-2: -Generally, the cell wall of plants is composed of strong Cellulose but the layer of lignin forms the Secondary cell wall and this is what gives it the strength and rigidity.

Detailed explanation-3: -Lignin is responsible for providing strength and rigidity to the cell wall of some algae and vascular plants. These cross-linked polymers are a very important component in the formation of the cell wall.

Detailed explanation-4: -Lignin is a class of complex organic polymers that form key structural materials in the support tissues of most plants. Lignins are particularly important in the formation of cell walls, especially in wood and bark, because they lend rigidity and do not rot easily.