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Main condition for a plant to perform cross pollination is
Options
(a) herkogamy
(b) dichogamy
(c) self sterility
(d) herkogamy & dichogamy & self sterility
Correct Answer:
herkogamy & dichogamy & self sterility
Explanation:
When the pollens are transferred from anther to stigma of different flower on different plant, it is called cross-pollination. It is a rule in unisexual flowers. But it also occurs a large number of bisexual flowers. The main reasons for cross-pollination in bisexual flowers are- dicliny, dichogamy, herkogamy, heterostyly and self sterility. Dichogamy is the condition of bisexual flower in which male and female reproductive parts mature at different times e.g., bajra, cotton, marigold etc. In herkogamy some physical barrier is present between male and female reproductive parts of a flower which prevents self pollination. e.g., Calotropis. In self sterility inspite of viable pollens they are unable to germinate on the stigma of same flower. e.g., radish, Petunia axillaris etc.
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Topics: Reproduction In Organisms and Plants
(129)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Population explosion has occured in the last
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- Chernobyl nuclear tragedy occurred on which date?
- Normal level of urea in blood plasma is (in mg/100 ml)
- Common cold is not cured by antibiotics because it is
Topics: Reproduction In Organisms and Plants (129)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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