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Q 14.     How does the cork act as a protective tissue?

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Cork is the outer protective layer or bark of a tree. The cork cells are dead and compactly packed with no intercellular space. Their cell walls are coated with a waxy substance, suberin, which do not allow water and gases to pass through. 

Therefore, it protects the plant against mechanical injury and also prevents the loss of water by evaporation.

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