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प्रश्न
When and why does a plant breeder employ the emasculation technique?
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उत्तर
Plant breeders employed this technique to prevent pollination within the same flower or to pollinate stigmas with pollen of the desired variety. To remove the anthers, the flowers are covered with a bag before they open. This ensures that the flower is pollinated by pollen grains obtained from desirable varieties only. Later, the mature, viable, and stored pollen grains are dusted on the bagged stigma by breeders to allow artificial pollination to take place and obtain the desired plant variety.
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संबंधित प्रश्न
Lever mechanism of pollination is observed in
- Salvia
- Jasmine
- Bougainvillea
- Butea
Name the part of the flower which the tassels of the corn- cob represent.
Why does self-pollination not lead to seed formation in self-incompatible species?
What is meant by emasculation?
Add a note on pollination mechanism in Salvia.
Give the floral adaptations for anemophily.
Compare the characteristic features of insect pollinated and wind pollinated flowers. Explain how the respective features assist in pollination.
Select and write the most appropriate answer from the given alternatives for the following subquestion:
A versatile anther is an adaptation for _______ type of pollination.
Exine and intine are the parts of
When maturation time of reproductive parts in a flower is different.
Type of Interaction where an individual sacrifices its own welfare (life) for the benefit of another animal of its own species is ______.
Differentiate between geitonogamy and xenogamy (allogamy).
- Nucellus
- Antipodals
- Synergids
- Micropyle
Describe the Advantages and Disadvantages of self-pollination to the Plant.
The question has four options. Choose the correct answer:
Pollination by insect is known as
Mention various adaptations for wind pollination.
Explain water pollination in detail with its types.
Which of the following plant contain unisexual flower?
Which type of pollination does the figure indicate?
Advantage of cleistogamy is:
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
Describe any three adaptations in anemophilous flowers.
Which of the following floral adapation are adapted by hydrophilous flowers?
What is epihydrophily?
What are the major abiotic factors that influence habitat?
Name the following:
Aquatic plants which are anemophilous.
Complete the following table:
| Sr. | Type of pollination | Agent | Kind of flower | Examples |
| (i) | ______ | Wind | ______ | Maize |
| (ii) | Chiropterophily | ______ | Dull colour, with strong fragrance, abundant nectar | Adansonia |
| (iii) | Entamophily | Insects | ______ | Rose/Jasmine |
| (iv) | Ornithophily | ______ | Brightly coloured, large and showy. They secrete profuse, dilute n ectar | ______ |
Briefly discuss any two methods by which plants avoid self-pollination.
