What are the 4 uses of glucose in plants?

 1. Glucose is a sugar broken down for energy in cellular respiration. 
2. Glucose molecules are bonded together to make starch, the food-storage molecule in plant cells. 
3. Glucose molecules are bonded into large bundled strands to make cellulose, the structural molecule that builds cell walls in plants.

Nonvascular plants don't have a vascular system, and they're small because their lack of vascular system means that they don't have any of the mechanics required for carrying food and water far lengths or any certain distance.