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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
A flower of tomato plant following the process of sexual reproduction produces 200 viable seeds.
Answer the following questions giving reasons :
(a) What would have been the minimum number of ovules present in pre-pollinated pistil ?
(b) How many microscope mother cells would minimally be required to produce requisite number of pollen grains ?
(c) How many pollen grains must have minimally pollinated the carple ?
(d) How many male gametes would have used to produce these 200 viable seeds ?
(e) How many megaspore mother cells were required in this process ?
Make a list of any three outbreeding devices that flowering plants have developed and explain how they help to encourage cross-pollination.
Can cross-pollination occur in cleistogamous flowers? Give reasons for your answer.
What is self-incompatibility?
What is meant by emasculation?
Enlist advantages and disadvantages of cross pollination
Add a note on pollination mechanism in Salvia.
Give the floral adaptations for anemophily.
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 ______.
Describe the structure of its microsporangium.
Name two characteristics of flowers in which pollination occur by wind.
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.
Give one word/term for the following:
When stigma and anthers do not grow up to the same height, which favors only cross-pollination.
Give one word/term for the following:
Pollination of flowers by insects.
In bisexual flowers, maturation of gynoecium before androecium is known as ______.
What are the different adaptations shown by bird-pollinated flowers?
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 ______.
Male and female flowers are present on different plants (dioecious) to ensure xenogamy, in ______.
Pollination refers to the ______.
Which type of pollination does the figure indicate?
Match the Column I with Column II.
| Column I | Column II |
| A. Pea | (i) Xenogamy |
| B. Jawar | (ii) Epihydrophily |
| C. Maize | (iii) Anemophily |
| D. Vallis | (iv) Bisexual |
| E. Cannabis | (v) Geitonogamy |
Pollination in water lilies is carried out by ______.
Name the pollinating agent of a flowering plant with large and coloured flowers with sticky stigma. State one characteristic feature of the pollen grains produced in such flowers.
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:
