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Both chasmogamous and cleistogamous flowers are present in
  • a)
    Helianthus
  • b)
    Commelina
  • c)
    Rosa
  • d)
    Gossypium
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Both chasmogamous and cleistogamous flowers are present ina)Helianthus...
Commelina produces two types of flower chasmogamous flowers which are similar to the flower 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 effect pollination. Thus, cleistogamous flowers are invariably autogamous as there is no chance of cross-pollen landing on the stigma. Cleistogamous flowers assure seed-setting even in the absence of pollinators. 
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Both chasmogamous and cleistogamous flowers are present ina)Helianthusb)Commelinac)Rosad)GossypiumCorrect answer is option 'B'. Can you explain this answer?
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