A protective layer external to the plasma membrane in plant cells - bacteria - fungi - and some protists. In plant cells - the wall is formed of cellulose fibers embedded in a polysaccharide-protein matrix. The primary cell wall is thin and flexible

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1. A protective layer external to the plasma membrane in plant cells - bacteria - fungi - and some protists. In plant cells - the wall is formed of cellulose fibers embedded in a polysaccharide-protein matrix. The primary cell wall is thin and flexible