Question:
Cleistogamous flowers are
Cleistogamous flowers are
Updated On: Jun 17, 2022
- Bisexual flowers which remain opened
- Bisexual flowers which remain closed
- Open female flower
- Open male flower
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The Correct Option is B
Solution and Explanation
Some plants such as Viola (common pansy), Oxalis and Commelina produce two types of flowers: chasmogamous flowers which are similar to flowers
of other species with exposed anthers and stigma, and cleistogamous flowers which do not open at all. In such flowers the anthers and stigma lie close to each other. When anthers dehisce in the flower buds, pollen grains
come in contact with the stigma to affect pollination. Thus, cleistogamous flowers are invariably autogamous as there is no chance of cross-pollen landing on the stigma. Cleistogamous flowers produce assured seed-set even in the absence of pollinators.
of other species with exposed anthers and stigma, and cleistogamous flowers which do not open at all. In such flowers the anthers and stigma lie close to each other. When anthers dehisce in the flower buds, pollen grains
come in contact with the stigma to affect pollination. Thus, cleistogamous flowers are invariably autogamous as there is no chance of cross-pollen landing on the stigma. Cleistogamous flowers produce assured seed-set even in the absence of pollinators.
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Concepts Used:
Sexual Reproduction in Flowering Plants
Sexual reproduction in flowering plants takes place or happens when the production of a new organism occurs from two parents by making use of their gametes or sex cells. Both sexual and asexual reproduction can be found in plants. Nearly all flowering plants reproduce sexually. Flowers play a captious role in the process as it carries both the male and female reproductive parts commonly known as androecium and gynoecium respectively.
An individual flower comprises the following parts -
- Pedicle
- Calyx
- Petals
- Sepals
- Stamen
- Pistil
- Receptacle