Question

    Heteromorphic self-incompatibility is due to differences

    in:
    A Flower morphology Correct Answer Incorrect Answer
    B Pollen viability Correct Answer Incorrect Answer
    C Chromosome number Correct Answer Incorrect Answer
    D Pollen tube growth Correct Answer Incorrect Answer
    E Endosperm formation Correct Answer Incorrect Answer

    Solution

    Heteromorphic systems (e.g., pin-thrum flowers in Primula) prevent selfing via morphological barriers.

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