Flowering plants have developed certain outbredding devices to discourage self-pollination and encourage cross-pollination. One of these is not an examples of such outbreeding device.
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Explanation:
1 . Dicliny- production of unisexual flowers e.g. maize , papaya.
2. dichogamy- male and female mature at different time ( protandrous- ficus, cotton)( protogynous - aristolochia, sun flower)
3 . Chasmogamous - the flower exhibit anthesis e.g. viola, oxalis comelina
4 Herkogamy- there is a physical barrier between the male and female organ .the style is longer than the filament.
e.g. calotropis
5 Self incompatibility - genetic mechanism ( S- gene ) the same type of pollen grain is not allow to germinate.
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