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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.
APPEARS IN
संबंधित प्रश्न
Lever mechanism of pollination is observed in
- Salvia
- Jasmine
- Bougainvillea
- Butea
With the help of a suitable example, explain protandry.
Explain the post-pollination events leading to seed production in angiosperms.
Add a note on pollination mechanism in Salvia.
Find the odd-one out, giving reason:
Ovary, style, pollen grain, stigma
Differentiate between the following:
Self pollination and cross pollination.
Fill in the blanks with suitable words.
_______ is a water-pollinated flower.
Name of the part of the ovary which gives rise to:
Fruit ______
Give one word/term for the following:
Pollination of flowers by insects.
Give one word/term for the following:
Pollination of flowers by birds.
State four features of flowers pollinated by insects.
Put a tick mark (✓) against the correct alternative in the following statements
Pollen is produced in the
Describe the Advantages and Disadvantages of self-pollination to the Plant.
What are the adaptations which are required in self-pollinated plants?
At which stage pollen grains are shed from the anther in Angiosperms?
Cleistogamous flowers are ______.
Which of these is a condition that makes flowers invariably autogamous?
In some plants anther and stigma mature at the same time this condition is called ______.
Which of the following plant contain unisexual flower?
The flower which does not open at all are called ______.
Pollination refers to the ______.
Autogamy can occur in a chasmogamous flower if ______.
Which of the following floral adapation are adapted by hydrophilous flowers?
Give any four floral adaptations for chiropterophily.
Name the following:
Aquatic plants which are anemophilous.
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?
