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प्रश्न
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 ______.
विकल्प
Wind
Animals
Water
Insects
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उत्तर
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 wind.
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संबंधित प्रश्न
Why do moss plants produce very large number of male gametes? Provide one reason. What are these gametes called?
Why angiosperm anthers are called dithecous?
What are chasmogamous flowers?
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 ______.
Complete the following chart and rewrite.
| Sr.No. | Agencies | type of pollination |
| 1 | Water | .................... |
| 2 | ........................... | Entomophily |
| 3 | Bat | .................... |
| 4 | ....................... | Ornithophily |
(Or)
Explain outbreeding devices in angiospermic plants.
Give one word/term for the following:
When stigma and anthers do not grow up to the same height, which favors only cross-pollination.
Answer the following question.
Express the process of pollination in Vallisneria.
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 self-pollinated plants?
Give an account of various abiotic agencies used in pollination along with their adaptations for pollination.
For which of the following attractants and rewards are required?
Autogamy can occur in a chasmogamous flower if ______.
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
Both chasmogamous and cleistogamous flowers are present in ______.
Pollination by water occurs in ______.
Which of the following pair has haploid structures?
Which of these is a condition that makes flowers invariably autogamous?
Heterostyly as a contrivance for cross-pollination is found in ______.
What is ornithophily?
Identify the set of correct statements:
- The flowers of Vallisneria are colourful and produce nectar.
- The flowers of waterlily are not pollinated by water.
- In most of water-pollinated species, the pollen grains are protected from wetting.
- Pollen grains of some hydrophytes are long and ribbon like.
- In some hydrophytes, the pollen grains are carried passively inside water.
Choose the correct answer from the options given below:
