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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
With the help of a suitable example, explain protandry.
Geitonogamous flowering plants are genetically autogamous but functionally cross-pollinated. Justify.
The transfer of pollen grains from the anther to the stigma of the same or of another flower of the same kind is known as ______.
Write two ways in which pollination may occur in plants.
Fill in the blank:
Male sex cells in plants are called _________.
In bisexual flowers, maturation of gynoecium before androecium is known as ______.
State four features of flowers pollinated by insects.
Answer the following question.
Express the process of pollination in Vallisneria.
What is a flower? Draw a typical flower and label its different parts.
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
A particular species of plant produces light, non-sticky pollen in large numbers and its stigmas are long and feathery. These modifications facilitate pollination by ______.
Cleistogamous flowers are ______.
Pollination occurs in ______.
Both chasmogamous and cleistogamous flowers are present in ______.
Which one of these statements is incorrect?
The following statements seem to describe the water-pollinated submerged plants.
Which type of pollination does the figure indicate?
Choose the correct statement from the following:
Describe any three adaptations in anemophilous flowers.
When and why does a plant breeder employ the emasculation technique?
