Final answer:
The cell wall, composed mainly of cellulose, is crucial for providing strength, shape, and protection to plant cells.
Explanation:
Cell wall is an extracellular structure of a plant cell that provides strength, protection, and maintains shape. It is primarily composed of cellulose microfibrils embedded in a matrix of other polysaccharides and proteins, giving it a durable structure.
This rigidity allows plants to remain upright even as they grow to great heights, supporting them against gravity. The cell wall also prevents excessive water uptake and distinguishes plant cells from animal cells.
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