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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
A flower of tomato plant following the process of sexual reproduction produces 240 viable seeds.
Answer the following questions giving reasons :
(a) What is the minimum number of pollen grains that must have been involved in the pollination of its pistil?
(b) What would have been the minimum number of ovules present in the ovary?
(c) How many megaspore mother cells were involved?
(d) What is the minimum number of microspore mother cells involved in the above case?
(e) How many male gametes were involved in this case?
Mention two strategies that evolved to prevent self-pollination in flowers.
Enlist advantages and disadvantages of cross pollination
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.
Give one word/term for the following:
Pollination of flowers by insects.
State four features of flowers pollinated by insects.
Differentiate between geitonogamy and xenogamy (allogamy).
Can a plant flowering in Mumbai be pollinated by pollen grains of the same species growing in New Delhi? Provide explanations to your answer.
Very short answer type question:
What is hydrophily?
Explain water pollination in detail with its types.
Both chasmogamous and cleistogamous flowers are present in ______.
Which of the following pair has haploid structures?
Chief pollinators of agricultural crops are ______.
Anemophily type of pollination is found in ______.
Both chasmogamous and cleistogamous flowers are present in ______.
Triple fusion in Capsella bursa pastoris is fusion of male gamete with ______.
In some plants anther and stigma mature at the same time this condition is called ______.
Insect pollinated flowers are ______.
Advantage of cleistogamy is:
Mention any one example of the hydrophilous flower.
What is hypohydrophily?
Complete the following table:
| Sr. | Type of pollination | Agent | Kind of flower | Examples |
| (i) | ______ | Wind | ______ | Maize |
| (ii) | Chiropterophily | ______ | Dull colour, with strong fragrance, abundant nectar | Adansonia |
| (iii) | Entamophily | Insects | ______ | Rose/Jasmine |
| (iv) | Ornithophily | ______ | Brightly coloured, large and showy. They secrete profuse, dilute n ectar | ______ |
Comparatively a large amount of pollen grains are wasted during ______.
Bird pollinated flowers are usually ______.
In sea grass, pollens are long, ribbon like and without exine exhibiting ______ pollination.
Entomophily refers to pollination by which agency?
Chiropterophily involves pollination by which organisms?
