Question

What are chasmogamous flowers? Can cross-pollination occurs in chastogamous flower? Give reasons for your answer.​

Answer 1

(i) Chasmogamous flowers. These flowers are similar to flowers of other species with exposed anthers and stigma.

Example. Viola (common pansy), Oxalis and Commelina.

(ii) Cleistogamous flowers cannot cross pollinate because the flowers do not open at all. In such flowers anthers and

stigma lie close to each other. When anther dehisces in the flower the pollen grain come in close contact with the stigma

to affect self-pollination. Thus there is no chance of cross pollination and only self pollination occurs.

Answer 2

Answer ;

Chasmogamous flowers or open flowers in which anther and stigma are expand for pollination. Cross-pollination cannot occurs in chasmogamous flowers.

Chasmogamous flowers or open flowers in which anther and stigma are expand for pollination. Cross-pollination cannot occurs in chasmogamous flowers. These flowers remain closed thus causing only self-pollination. In cleistogamous flowers, anthers dehisce inside the closed flowed. So, the pollen grains come in contact of cross-pollination, e.g., Oxalis, Viola.

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