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9th Class Science Tissues Question Bank Tissues

  • question_answer
    The walls of cork cells are thickened by the deposition of an organic substance which make these cells impermeable to water and gases. This substance is

    A) Pectin               

    B) Suberin

    C) Lignin   

    D)        None of these

    Correct Answer: B

    Solution :

    Cork cells are dead cells without intercellular spaces. Their cell wall is very thick due to deposition of an organic substance called Suberin, which is impermeable to water and gases.


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