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प्रश्न
What is self-incompatibility?
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उत्तर
Sexual incompatibility occurs when a pistil with functioning female gametes fails to establish seeds after pollination with viable and fertile pollen capable of fertilizing another pistil. Sexual incompatibility can arise between members of different species or within the same species. The condition is also known as self-incompatibility.
संबंधित प्रश्न
Describe the characteristic features of wind pollinated flowers.
Make a list of any three outbreeding devices that flowering plants have developed and explain how they help to encourage cross-pollination.
Can cross-pollination occur in cleistogamous flowers? Give reasons for your answer.
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 ______.
Can a unisexual flower be self pollinated?
Name of the parts of the ovary which give rise to:
Fruit wall ______
Give one word/term for the following:
Pollination of flowers by birds.
Can a plant flowering in Mumbai be pollinated by pollen grains of the same species growing in New Delhi? Provide explanations to your answer.
Put a tick mark (✓) against the correct alternative in the following statements
Pollen is produced in the
What are the adaptations which are required in cross-pollinated
What are the different adaptations shown by bird-pollinated flowers?
Autogamy can occur in a chasmogamous flower if ______.
Pollination by water occurs in ______.
Pollination occurs in ______.
Chief pollinators of agricultural crops are ______.
Both chasmogamous and cleistogamous flowers are present in ______.
Plants with ovaries having only one or a few ovules are generally pollinated by ______.
Which one of these statements is incorrect?
The following statements seem to describe the water-pollinated submerged plants.
Which one of the following may require pollinators, but is genetically similar to autogamy?
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 ______
Choose the correct statement from the following:
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
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 |
Pollination in water lilies is carried out by ______.
Give any four floral adaptations for chiropterophily.
What are the major abiotic factors that influence habitat?
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?
Comparatively a large amount of pollen grains are wasted during ______.
