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प्रश्न
What is self-incompatibility?
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उत्तर
Sexual incompatibility occurs when a pistil with functioning female gametes fails to establish seeds after pollination with viable and fertile pollen capable of fertilizing another pistil. Sexual incompatibility can arise between members of different species or within the same species. The condition is also known as self-incompatibility.
संबंधित प्रश्न
Lever mechanism of pollination is observed in
- Salvia
- Jasmine
- Bougainvillea
- Butea
Why do moss plants produce very large number of male gametes? Provide one reason. What are these gametes called?
Describe the characteristic features of wind pollinated flowers.
Enlist advantages and disadvantages of cross pollination
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 ______.
Name two characteristics of flowers in which pollination occur by wind.
Find the odd-one out, giving reason:
Ovary, style, pollen grain, stigma
Differentiate between the following:
Self pollination and cross pollination.
Compare the characteristic features of insect pollinated and wind pollinated flowers. Explain how the respective features assist in pollination.
Fill in the blanks with suitable words.
Different timings for the maturation of gynoecium and androecium is called ________.
Give one word/term for the following:
Pollination of flowers by birds.
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 ______.
- Nucellus
- Antipodals
- Synergids
- Micropyle
Wind pollination is common in ______.
Cleistogamous flowers are ______.
Both chasmogamous and cleistogamous flowers are present in ______.
Which of the following pair has haploid structures?
Anemophily type of pollination is found in ______.
Triple fusion in Capsella bursa pastoris is fusion of male gamete with ______.
Which of these is a condition that makes flowers invariably autogamous?
The flower which possesses both androecium and gynoecium is called perfect or ______.
Pollination refers to the ______.
Advantage of cleistogamy is:
What is ornithophily?
Describe any three adaptations in hydrophilous flowers.
What are the major abiotic factors that influence habitat?
Name the following:
One plant each of Hypohydrophily and epihydrophily.
Briefly discuss any two methods by which plants avoid self-pollination.
