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A cell wall is a rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants, fungi, and bacteria. In the algae and higher plants it consists mainly of cellulose.
The main function of the cell wall is to provide structural strength and support, and also provide a semi-permeable surface for molecules to pass in and out of the cell.
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(a)cell wall is a structural layer surrounding some types of cells , just outside the cell membrane.
(b) (i) cell wall provides a structural support to the cell.
(ii) cell wall act as a filter of mechanisms in cell.
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