(a) (i) Protandry - Male reproductive organ/ anthers androecia/ earlier than female reproduction organ/ carpels/ stigma/ pistil/ gynoecium in a flower.
(ii) Self sterility - pollen grains are sterile to stigma of the same plants or same Flowers
(b) - Increases variety;
- Intermixing of genetic material hence hybrid vigour and variations
johnmulu answered the question on May 9, 2017 at 06:17
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