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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
With the help of a suitable example, explain protandry.
Describe the characteristic features of wind pollinated flowers.
Name the part of the flower which the tassels of the corn- cob represent.
Find the odd-one out, giving reason:
Ovary, style, pollen grain, stigma
Name of the part of the ovary which gives rise to:
Fruit ______
When maturation time of reproductive parts in a flower is different.
Give one word/term for the following:
When stigma and anthers do not grow up to the same height, which favors only cross-pollination.
Mention any two contrivances in flowers which favour cross-pollination.
Type of interaction where an individual sacrifices its own welfare (life) for the benefit of another animal of its own species is ______.
The question has four options. Choose the correct answer:
Pollination by insect is known as
Very short answer type question:
What is hydrophily?
Mention various adaptations for wind pollination.
Explain water pollination in detail with its types.
Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by ______.
Which of the following is not a water pollinated plant?
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 |
Which one of the following may require pollinators, but is genetically similar to autogamy?
Which of the following floral adapation are adapted by hydrophilous flowers?
Describe any three adaptations in hydrophilous flowers.
Briefly discuss any two methods by which plants avoid self-pollination.
