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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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