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प्रश्न
What is self-incompatibility?
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उत्तर
Self-incompatibility is a genetic mechanism in angiosperms that prevents self-pollination. It develops genetic incompatibility between individuals of the same species or between individuals of different species. The pollen grains of an anther do not germinate on the stigma of the same flower.
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संबंधित प्रश्न
Geitonogamous flowering plants are genetically autogamous but functionally cross-pollinated. Justify.
What is the bagging technique?
Enlist advantages and disadvantages of cross pollination
Find the odd-one out, giving reason:
Ovary, style, pollen grain, stigma
Compare the characteristic features of insect pollinated and wind pollinated flowers. Explain how the respective features assist in pollination.
Which one of the following is one of the characteristics of self-pollinated flowers?
Give one word/term for the following:
Pollination of flowers by insects.
In bisexual flowers, maturation of gynoecium before androecium is known as ______.
State four features of flowers pollinated by insects.
Differentiate between geitonogamy and xenogamy (allogamy).
Can a plant flowering in Mumbai be pollinated by pollen grains of the same species growing in New Delhi? Provide explanations to your answer.
At which stage pollen grains are shed from the anther in Angiosperms?
Wind pollination is common in ______.
Cleistogamous flowers are ______.
Both chasmogamous and cleistogamous flowers are present in ______.
Feathery stigma occurs in ______.
Which one of these statements is incorrect?
The following statements seem to describe the water-pollinated submerged plants.
In the dioecious aquatic plant shown, identify the characteristics of the male flowers that reach the female flowers for pollination:
| Size of the flower | Colour of flower | The characteristic feature of pollen grain | |
| A | small | brightly coloured | Lightweight and non-sticky |
| B | large | colourless | large and sticky |
| C | small | white | small, covered with mucilage |
| D | large | colourless | non-sticky |
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
What is hypohydrophily?
