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    Question

    Failure of a viable pollen to grow down the style of

    the flower of the same variety is called ___________.
    A Self-sterility Correct Answer Incorrect Answer
    B Self-incompatibility Correct Answer Incorrect Answer
    C Self-unfruitfulness Correct Answer Incorrect Answer
    D Sterility Correct Answer Incorrect Answer
    E None of the above Correct Answer Incorrect Answer

    Solution

    Self-incompatibility is widespread mechanism in flowering plants that prevents inbreeding and promotes outcrossing.

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