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प्रश्न
Explain any two devices by which autogamy is prevented in flowering plants.
स्पष्ट कीजिए
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उत्तर
Dichogamy: anthers and stigma mature at different times (protandry or protogyny), preventing pollen from fertilising the same flower.
Self-incompatibility: a genetic mechanism prevents self-pollen from germinating or its pollen tube from growing, so fertilisation does not occur.
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