What would happen if a tree didn't have cellulose?

If a tree didn't have cellulose, it would lack the structural integrity necessary to support its height and maintain its shape. Cellulose is a critical component of the cell walls in plant cells, providing rigidity and strength, which allows trees to grow tall and withstand environmental stresses. Without it, the tree would likely collapse under its own weight and be unable to perform essential functions like transport of water and nutrients. Ultimately, the tree would be unable to survive and thrive in its ecosystem.