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प्रश्न
Can cross-pollination occur in cleistogamous flowers? Give reasons for your answer.
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उत्तर
Cross-pollination cannot occur in cleistogamous flowers. Cleistogamous flowers do not open at all. In these flowers, the anthers and stigma are close together; when the anthers dehisce in the flower buds, pollen grains touch the stigma, resulting in pollination. As a result, these flowers are always self-pollinated since they remain closed, and cross pollen cannot land on the stigma. Cleistogamous flowers can pollinate and set seeds without pollinators.
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संबंधित प्रश्न
With the help of a suitable example, explain protandry.
What are chasmogamous flowers?
What is self-incompatibility?
Why does self-pollination not lead to seed formation in self-incompatible species?
Write two ways in which pollination may occur in plants.
What is meant by pollination?
Fill in the blank:
Male sex cells in plants are called _________.
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.
When maturation time of reproductive parts in a flower is different.
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.
Describe the advantages and disadvantages of cross-pollination to the plant.
Type of interaction where an individual sacrifices its own welfare (life) for the benefit of another animal of its own species is ______.
Put a tick mark (✓) against the correct alternative in the following statements
Vegetative propagation is not observed in:
What are the adaptations which are required in self-pollinated plants?
Give an account of any two biotic agents for pollination along with their adaptations.
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
A particular species of plant produces light, non-sticky pollen in large numbers and its stigmas are long and feathery. These modifications facilitate pollination by ______.
Pollination by water occurs in ______.
Triple fusion in Capsella bursa pastoris is fusion of male gamete with ______.
Which of these is a condition that makes flowers invariably autogamous?
Which of the following plant contain unisexual flower?
During Hybridization process anther of the bisexual flower is removed before it dehisces is called ______.
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 ______
Autogamy can occur in a chasmogamous flower if ______.
Describe any three adaptations in anemophilous flowers.
Pollination in water lilies is carried out by ______.
