CBSE 2026 · Region 2 · Set 2 · Q24 · 3 marks
Chasmogamous flowers remain open and expose their reproductive parts. Explain how this structural feature supports different types of pollination.
Marking-scheme solution
Autogamy, pollen grains from one flower fall on the stigma of the same flower.
Geitonogamy, Transfer of pollen grains from anther of one flower to stigma of another flower of same plant.
Xenogamy, Transfer of pollen grains from anther of one flower to stigma of another flower of another plant.
Sexual Reproduction in Flowering PlantsPre-fertilisation: Structures and EventsUnderstandshort_answermedium
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CBSE Class 12 Biology past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.