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प्रश्न
Differentiate between geitonogamy and xenogamy.
उत्तर
| Xenogamy | Geitonogamy | ||
| 1. | Xenogamy is the transfer of pollen grains from the anther to the stigma of a different plant. | 1. | Geitonogamy is the transfer of pollen from the anther of one flower to the stigma of another flower in the same plant. |
| 2. | This is the only type of pollination which during pollination brings genetically different types of pollen grains to the stigma. It is also known as allogamy. | 2. | Genetically, it is similar to autogamy, since the pollen grains come from the same plant. But it requires pollinating agents that help to transfer the pollen from another flower on the same plant. |
| 3. | It is cross-pollination. | 3. | It is self-pollination. |
APPEARS IN
संबंधित प्रश्न
A flower of tomato plant following the process of sexual reproduction produces 240 viable seeds.
Answer the following questions giving reasons :
(a) What is the minimum number of pollen grains that must have been involved in the pollination of its pistil?
(b) What would have been the minimum number of ovules present in the ovary?
(c) How many megaspore mother cells were involved?
(d) What is the minimum number of microspore mother cells involved in the above case?
(e) How many male gametes were involved in this case?
What are chasmogamous flowers?
Define the term Pollinating.
Compare the characteristic features of insect pollinated and wind pollinated flowers. Explain how the respective features assist in pollination.
Exine and intine are the parts of
(iii) Synergids
(iv) Micropyle
Even in absence of pollinating agents seed-setting is assured in ______.
Male and female flowers are present on different plants (dioecious) to ensure xenogamy, in ______.
Autogamy can occur in a chasmogamous flower if ______.
Give any four floral adaptations for chiropterophily.
