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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
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.
Geitonogamous flowering plants are genetically autogamous but functionally cross-pollinated. Justify.
What is meant by emasculation?
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 ______.
What is meant by pollination?
Fill in the blanks with suitable words.
Different timings for the maturation of gynoecium and androecium is called ________.
Fill in the blanks with suitable words.
_______ is a water-pollinated flower.
Name of the parts of the ovary which give rise to:
Fruit wall ______
Differentiate between geitonogamy and xenogamy (allogamy).
Put a tick mark (✓) against the correct alternative in the following statements
Vegetative propagation is not observed in:
Name the two types of pollination.
What is a flower? Draw a typical flower and label its different parts.
Describe pollination. How many types of pollinations are found?
Give an account of various abiotic agencies used in pollination along with their adaptations for pollination.
Autogamy can occur in a chasmogamous flower if ______.
A dioecious flowering plant prevents both ______.
Even in absence of pollinating agents seed-setting is assured in ______.
Which of these is a condition that makes flowers invariably autogamous?
Which of the following plant contain unisexual flower?
Which type of flower has ovary superior?
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 ______
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
What is self-incompatibility?
Which of the following floral adapation are adapted by hydrophilous flowers?
What is hypohydrophily?
What is epihydrophily?
Name the following:
Aquatic plants which are anemophilous.
When and why does a plant breeder employ the emasculation technique?
