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What is autogamy? Explain the devices that the plants have developed to prevent this. |
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Answer» Autogamy: Self pollination in which there is transfer of pollen grains from the anters to the stigma at the same flower. Devices in flowering plants to prevent autogamy: 1. Release of pollen grains before the stigma becomes receptive or stigma becomes receptive much before the release of pollen grains. 2. Placement of anthers and stigma at different positions so that pollen cannot come in contact with the stigma of the same flower. 3. Self incompatibility – Genetic mechanism which inhibits the germination of pollen grain or growth of the pollen tube inside the style, thus preventing the fertilization process. 4. Unsexually : Production to unisexual flowers (male and female flowers on different plants or on the same plant). |
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