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प्रश्न
Differentiate between geitonogamy and xenogamy (allogamy).
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उत्तर
| Xenogamy (allogamy) | Geitonogamy | |
| 1. | Xenogamy is the transfer of pollen grains from the anther to the stigma of a different plant. | Geitonogamy is the transfer of pollen from one flower’s anther to another flower’s stigma. |
| 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. | Genetically, it is similar to autogamy, since the pollen grains come from the same plant. But it requires pollinating agents that help transfer the pollen from another flower onto the same plant. |
| 3. | It is cross-pollination. | It is self-pollination. |
संबंधित प्रश्न
Can cross-pollination occur in cleistogamous flowers? Give reasons for your answer.
Write two ways in which pollination may occur in plants.
Can a unisexual flower be self pollinated?
Which one of the following is one of the characteristics of self-pollinated flowers?
At which stage pollen grains are shed from the anther in Angiosperms?
Give an account of any two biotic agents for pollination along with their adaptations.
Give an account of various abiotic agencies used in pollination along with their adaptations for pollination.
Pollination by water occurs in ______.
Anemophily type of pollination is found in ______.
Both chasmogamous and cleistogamous flowers are present in ______.
The flower which possesses both androecium and gynoecium is called perfect or ______.
A botanist studying Viola (common pansy) noticed that one of the two flower types withered and developed no further due to some unfavorable condition, but the other flower type on the same plant survived and it resulted in an assured seed set. Which of the following will be correct?
Which type of pollination does the figure indicate?
Advantage of cleistogamy is:
In which one of the following pollination is autogamous?
Match the Column I with Column II.
| Column I | Column II |
| A. Pea | (i) Xenogamy |
| B. Jawar | (ii) Epihydrophily |
| C. Maize | (iii) Anemophily |
| D. Vallis | (iv) Bisexual |
| E. Cannabis | (v) Geitonogamy |
Mention any one example of the hydrophilous flower.
Give any four floral adaptations for chiropterophily.
What are the major abiotic factors that influence habitat?
When and why does a plant breeder employ the emasculation technique?
