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Haryana PMT Haryana PMT Solved Paper-2004

  • question_answer
    In a plant organ which is covered by periderm and in which the stomata are absent, some gaseous exchange still takes place through :

    A)  aerenchyma                     

    B)  crichomes

    C)  pneumatophores          

    D)  lenticels

    Correct Answer: D

    Solution :

    Mature stems of woody plants have a peripheral water proof tissue called cork (Phellum). A number of scars found on the surface of cork known as lenticels. Lenticels allow the gaseous exchange between the atmosphere and living cells below the cork.


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