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| form of a diploid plant in the alternation of generations that produces asexual spores |
| organism that has a nucleus containing genetic material |
| lignin (lĭg'nĭn) Pronunciation Key
A complex organic compound that binds to cellulose fibers and hardens and strengthens the cell walls of plants. Lignin is a polymer consisting of various aromatic alcohols, and is the chief noncarbohydrate constituent of wood. |