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| | Definition of Cell wall |
 | | The cell walls of archaea are not made of peptidoglycan, but some archaea may contain pseudopeptidoglycan, which is composed of N-acetyltalosaminuronic acid, instead of N-acetyl muramic acid in peptidoglycan. |
| | Cells interact though plasmodesma(ta), which are inter-connecting channels of cytoplasm that connect to the protoplasts of adjacent cells across the cell wall. |
| | Not all species of fungi have cell walls but in those that do, the cell walls are composed of cellulose and chitin, the same carbohydrate that gives strength to the exoskeletons of insects. |
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