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Biology, 20.07.2019 13:00 jeremytheprimerapper

In plants, the cell wall forms as a young plant secretes polysaccharides onto the outer surface of its plasma membrane. being thin and pliable, this primary wall allows the cell to enlarge and change shape. in mature woody plants, cells in some tissues deposit material onto the primary wall's inner surface. why doesn't this secondary wall form on the outer surface of the primary wall?

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