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Question

Both chasmogamous and cleistogamous flowers are present in

A
Commelina
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B
Rosa
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C
Helianthus
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D
Gossypium
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Solution

The correct option is A Commelina
Chasmogamous flowers are those that open on maturity and have exposed anther and stigma to make them available for pollination. Some of the chasmogamous flowers bearing plants include- Helianthus (Sunflower), Rosa, Gossypium (Cotton).

Cleistogamous flowers are intersexual and remain closed. So, self-pollination occurs in them. In plants Commelina, Viola, Oxalis both cleistogamous and chasmogamous flowers may be found.

Cleistogamy occurs late in the flowering season in some plants while chasmogamous flowers generally develop when resources like light, water, nutrients, and pollinators are high.

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