How does the cork act as a protective tissue?
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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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Answer:
Suberin is a waterproofing waxy substance which restricts the water movement. Presence of suberin in dead cells of cork and absence of intercellular spaces makes the cells impermeable to water and gases thereby protecting the underlying tissues from desiccation, mechanical injury and pathogenic infection.
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