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(A) : Some plants such as $Viola$ (common pansy),$Oxalis$,and $Commelina$ produce two types of flowers: chasmogamous flowers,which are similar to flow

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Commelina

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(A) : 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 cleistogamous flowers,the anthers and stigma lie very close to each other.When anthers dehisce in the flower buds,pollen grains come in contact with the stigma to effect pollination.Thus,cleistogamous flowers are invariably autogamous as there is no chance of cross-pollen landing on the stigma.Therefore,cleistogamous flowers produce assured seed-set even in the absence of pollinators.

Even in the absence of pollinating agents,seed setting is assured in

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