Answer
410.1k+ views
Hint: In flowering plants, male and female gametes are produced in the pollen grain and embryo sac respectively. These gametes are non-motile, that is do not move, therefore, they have to be brought together for fertilisation. Pollination is the mechanism to get the result of this objective. The transfer of pollen grains to the stigma is called pollination
Complete answer:
Cleistogamy: A type of condition in which the flower does not open. In such flowers, the anthers and stigma are very close to each other. When anther dehisce in the flower buds, pollen grains come in contact with stigma to affect pollination. Some plants such as Viola (common pansy), Oxalis and Commelina help to give rise to both types of flowers, i.e., open flowers (chasmogamous) and closed flowers (cleistogamous).
Advantage of Cleistogamy:
1.It makes sure seed formation even in the absence of any pollinating agent.
2.It is cheaper for the plant as there is no costly nectar or fragrance which the plant has to produce for pollination.
Now let us find solution from given options: -
Ficus : It has an open type of flower so it undergoes cross pollination hence it has chasmogamous flowers. It belongs to pteridophytes. It undergoes dichogamy.
Commelina : It has a close type of flower so it undergoes self-pollination so has a cleistogamous flower.
Anthocephalus : It has an open type of flower so it undergoes cross pollination hence it has chasmogamous flowers.
Vallisneria : The male and female flowers are produced in two separate plants. So, it prevents autogamy thus having chasmogamous flowers.
Hence, the correct answer is option (B)
Note: Some advantages of cleistogamy include the individual produced have limited genetic variability. Cleistogamy is an adaptation seen in self-pollination. The other adaptation includes bisexuality that is both the essential whorls are present in the same flower.
Complete answer:
Cleistogamy: A type of condition in which the flower does not open. In such flowers, the anthers and stigma are very close to each other. When anther dehisce in the flower buds, pollen grains come in contact with stigma to affect pollination. Some plants such as Viola (common pansy), Oxalis and Commelina help to give rise to both types of flowers, i.e., open flowers (chasmogamous) and closed flowers (cleistogamous).
Advantage of Cleistogamy:
1.It makes sure seed formation even in the absence of any pollinating agent.
2.It is cheaper for the plant as there is no costly nectar or fragrance which the plant has to produce for pollination.
Now let us find solution from given options: -
Ficus : It has an open type of flower so it undergoes cross pollination hence it has chasmogamous flowers. It belongs to pteridophytes. It undergoes dichogamy.
Commelina : It has a close type of flower so it undergoes self-pollination so has a cleistogamous flower.
Anthocephalus : It has an open type of flower so it undergoes cross pollination hence it has chasmogamous flowers.
Vallisneria : The male and female flowers are produced in two separate plants. So, it prevents autogamy thus having chasmogamous flowers.
Hence, the correct answer is option (B)
Note: Some advantages of cleistogamy include the individual produced have limited genetic variability. Cleistogamy is an adaptation seen in self-pollination. The other adaptation includes bisexuality that is both the essential whorls are present in the same flower.
Recently Updated Pages
Mark and label the given geoinformation on the outline class 11 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
When people say No pun intended what does that mea class 8 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Name the states which share their boundary with Indias class 9 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give an account of the Northern Plains of India class 9 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Change the following sentences into negative and interrogative class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Advantages and disadvantages of science
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Trending doubts
Bimbisara was the founder of dynasty A Nanda B Haryanka class 6 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Which are the Top 10 Largest Countries of the World?
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
10 examples of evaporation in daily life with explanations
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give 10 examples for herbs , shrubs , climbers , creepers
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
How do you graph the function fx 4x class 9 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference Between Plant Cell and Animal Cell
![arrow-right](/cdn/images/seo-templates/arrow-right.png)