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प्रश्न
As a senior biology student you have been asked to demonstrate to the students of secondary level in your school, the procedure(s) that shall ensure cross-pollination in a hermaphrodite flower. List the different steps that you would suggest and provide reasons for each one of them.
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उत्तर
As a senior biology student, to demonstrate cross-pollination in a hermaphrodite flower, first perform emasculation by removing stamens before pollen release to prevent self-pollination. Next, bag the emasculated flower to avoid contamination from unwanted pollen. Then, collect pollen from a different plant and dust it onto the stigma of the emasculated flower. Finally, re-bag and label the flower to ensure controlled cross-pollination. This procedure prevents self-fertilisation and promotes genetic variation.
संबंधित प्रश्न
Make a list of any three outbreeding devices that flowering plants have developed and explain how they help to encourage cross-pollination.
What are chasmogamous flowers?
What is self-incompatibility?
Why does self-pollination not lead to seed formation in self-incompatible species?
Mention any two contrivances in flowers which favour cross-pollination.
Describe the advantages and disadvantages of cross-pollination to the plant.
- Nucellus
- Antipodals
- Synergids
- Micropyle
Choose the correct statement from the following.
Both chasmogamous and cleistogamous flowers are present in ______.
Pollination occurs in ______.
Which type of pollination does the figure indicate?
In which one of the following pollination is autogamous?
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 ______
Mention any one example of the hydrophilous flower.
Name the following:
One plant each of Hypohydrophily and epihydrophily.
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.
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:
