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प्रश्न
What are chasmogamous flowers?
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उत्तर
There are two types of flowers present in plants, namely Oxalis and Viola.
Both chasmogamous and cleistogamous flowers are present in plants. Chasmogamous flowers have exposed anthers and stigmata, similar to the flowers of other species.
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संबंधित प्रश्न
With the help of a suitable example, explain protandry.
Name the part of the flower which the tassels of the corn- cob represent.
Add a note on pollination mechanism in Salvia.
Give the floral adaptations for anemophily.
Differentiate between the following:
Self pollination and cross pollination.
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.
Compare the characteristic features of insect pollinated and wind pollinated flowers. Explain how the respective features assist in pollination.
Exine and intine are the parts of
Fill in the blanks with suitable words.
Different timings for the maturation of gynoecium and androecium is called ________.
Mention any two contrivances in flowers which favour cross-pollination.
Describe the advantages and disadvantages of cross-pollination to the plant.
In bisexual flowers, maturation of gynoecium before androecium is known as ______.
Give four adaptations shown by flowers pollinated by wind.
Answer the following question.
Express the process of pollination in Vallisneria.
- Nucellus
- Antipodals
- Synergids
- Micropyle
Mention various adaptations for wind pollination.
Give an account of any two biotic agents for pollination along with their adaptations.
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
Chief pollinators of agricultural crops are ______.
Which of the following plant contain unisexual flower?
Insect pollinated flowers are ______.
Pollination refers to the ______.
Mention any one example of the hydrophilous flower.
What is epihydrophily?
Comparatively a large amount of pollen grains are wasted during ______.
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:
