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Sexual Reproduction in Flowering Plants — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYSexual Reproduction in Flowering Plants5 Marks
Question
Angiosperm flowers may be monoecious, cleistogamous or show self-incompatibility. Describe the characteristic features of each one of them and state which one of these flowers promotes inbreeding and outbreeding respectively.
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Answer

  1. Monoecious refers to the condition, where a plant bears both male and female flowers or bisexual flowers.
  2. Cleistogamous flowers are those bisexual flowers which do not open at all even at maturity; they are invariably autogamous.
  3. Self-incompatibility is the genetic mechanism that prevents the self-pollen from fertilising the ovules.
  4. Cleistogamous flowers promote inbreeding and self-incompatibility promotes outbreeding.

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