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Biology · HSEXUAL REPRODUCTION IN FLOWERING PLANTS

हिन्दी

Self-incompatibility in flowering plants is an outbreeding mechanism that:

  1. Is a morphological barrier preventing anthers and stigma from touching each other
  2. Is a genetic mechanism that prevents self-pollen from fertilising ovules by inhibiting pollen germination or pollen tube growth in the pistil
  3. Causes synchrony between pollen release and stigma receptivity
  4. Promotes the development of cleistogamous flowers

Correct answer · Option 2

Is a genetic mechanism that prevents self-pollen from fertilising ovules by inhibiting pollen germination or pollen tube growth in the pistil

Explanation

Self-incompatibility is a genetic mechanism that prevents self-pollen (from the same flower or other flowers of the same plant) from fertilising ovules by inhibiting pollen germination or pollen tube growth in the pistil.
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