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Reproduction in Lower and Higher Plants — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYReproduction in Lower and Higher Plants5 Marks
Question
Dichogamy
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Answer

  1. When stamens and carpels mature at different times in a bisexual flower, the condition is known as dichogamy.
  2. Owing to dichogamy self-pollination is avoided and cross pollination is favoured.
  3. Dichogamy is of two types, viz., protandry and protogyny.
  4. Protandry is seen in sunflower in which pollen grains are released much before stigma becomes receptive.
  5. In protogyny, stigma becomes ready to receive the pollen grains before the anthers mature. It is seen in plants like Gloriosa.

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