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प्रश्न
What is the bagging technique?
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उत्तर
Various artificial hybridization techniques (under various crop improvement programmes) involve the removal of the anther from bisexual flowers without affecting the female reproductive part (pistil) through the process of emasculation. Then, these emasculated flowers are wrapped in bags to prevent pollination by unwanted pollen grains. This process is called bagging.
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संबंधित प्रश्न
Name the part of the flower which the tassels of the corn- cob represent.
Fill in the blanks:
The two kinds of pollination are __________ and __________.
Exine and intine are the parts of
Fill in the blanks with suitable words.
_______ is a water-pollinated flower.
Name of the part of the ovary which gives rise to:
Fruit ______
Type of interaction where an individual sacrifices its own welfare (life) for the benefit of another animal of its own species is ______.
Answer the following question.
Express the process of pollination in Vallisneria.
What are the adaptations which are required in self-pollinated plants?
Wind pollination is common in ______.
Cleistogamous flowers are ______.
Pollination by water occurs in ______.
Which of these is a condition that makes flowers invariably autogamous?
Insect pollinated flowers are ______.
Advantage of cleistogamy is:
The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which, during pollination, brings genetically different types of pollen grains to stigma, is ______
Describe any three adaptations in anemophilous flowers.
Pollination in water lilies is carried out by ______.
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.
When and why does a plant breeder employ the emasculation technique?
Comparatively a large amount of pollen grains are wasted during ______.
Identify the set of correct statements:
- The flowers of Vallisneria are colourful and produce nectar.
- The flowers of waterlily are not pollinated by water.
- In most of water-pollinated species, the pollen grains are protected from wetting.
- Pollen grains of some hydrophytes are long and ribbon like.
- In some hydrophytes, the pollen grains are carried passively inside water.
Choose the correct answer from the options given below:
In sea grass, pollens are long, ribbon like and without exine exhibiting ______ pollination.
Which of the following is an abiotic agent of pollination?
Anemophily is the process of pollination by which agent?
Entomophily refers to pollination by which agency?
Autogamy refers to which type of pollination process?
