Here's why:
* Cellulose is a polysaccharide (a complex carbohydrate) made up of long chains of glucose molecules.
* These chains are linked together to form strong, rigid fibers.
* These fibers are bundled together to form microfibrils, which are then further bundled into macrofibrils.
* These bundles of fibers provide the structural support for plant cells, allowing them to withstand pressure and maintain their shape.
While cellulose is the primary structural component, lignin also plays a significant role in providing strength and rigidity, especially in woody plants.
