NEET BIOLOGY

Detailed explanation-1: -Chasmogamous flowers are the flowers with exposed anthers and stigma . For autogamy (transfer of pollen from anther to stigma of the same flower) to occur in chasmogamous flowers both pollen and ovule should mature simultaneously. There should be synchrony between pollen release and stigma receptivity.

Detailed explanation-2: -Autogamy is pollination within a flower. Chasmogamous flowers are those in which anthers and stigma are exposed. For autogamy, in such a flower to take place, pollen and ovule should mature simultaneously and anther and stigma should lie close to each other.

Detailed explanation-3: -Hence, only self-pollination is possible in these flowers. When anther dehisces in the flower the pollen grain comes in close contact with the stigma to affect self-pollination, thus there is no chance of cross-pollination and only self-pollination occurs. These flowers are non-showy and inconspicuous and homogamous.

Detailed explanation-4: -Solution : Chasmogamous flowers are the open flower similar to the flower of other species, with exposed anthers and stigma. They favour cross-pollination e.g., Rose, Cleistogamous flowers are intersexual. They remain closed causing self-pollination.