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प्रश्न
Choose the correct statement from the following:
विकल्प
Cleistogamous flowers always exhibit autogamy.
Chasmogamous flowers always exhibit geitonogamy.
Cleistogamous flowers exhibit both autogamy and geitonogamy.
Chasmogamous flowers never exhibit autogamy.
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उत्तर
Cleistogamous flowers always exhibit autogamy.
Explanation:
Cleistogamous flowers never open, so pollen from other plants cannot reach their stigma. This means they are always pollinated by their pollen, ensuring self-pollination (autogamy). This mechanism does not rely on external pollinating agents, making autogamy guaranteed in cleistogamous flowers.
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संबंधित प्रश्न
Describe the characteristic features of wind pollinated flowers.
List the different types of pollination depending upon the source of pollen gain.
Can cross-pollination occur in cleistogamous flowers? Give reasons for your answer.
What is meant by emasculation?
Describe the structure of its microsporangium.
Write two ways in which pollination may occur in plants.
Can a unisexual flower be self pollinated?
Fill in the blanks with suitable words.
_______ is a water-pollinated flower.
Name of the part of the ovary which gives rise to:
Fruit ______
Name of the parts of the ovary which give rise to:
Fruit wall ______
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.
Describe the advantages and disadvantages of cross-pollination to the plant.
Answer the following question.
Write the difference in the characteristics of the progeny produced as a result of the two processes.
Can a plant flowering in Mumbai be pollinated by pollen grains of the same species growing in New Delhi? Provide explanations to your answer.
- Nucellus
- Antipodals
- Synergids
- Micropyle
Write different modes of pollination in detail with suitable examples.
What are the adaptations which are required in self-pollinated plants?
Cleistogamous flowers are ______.
Which of the following pair has haploid structures?
Triple fusion in Capsella bursa pastoris is fusion of male gamete with ______.
Which of the following plant contain unisexual flower?
Insect pollinated flowers are ______.
Which type of pollination does the figure indicate?
Autogamy can occur in a chasmogamous flower if ______.
What is self-incompatibility?
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 |
Give any four floral adaptations for chiropterophily.
