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Biology

Outbreeding devices and pollen-pistil interaction

पर-प्रजनन युक्तियाँ और परागकण–स्त्रीकेसर अंतःक्रिया

In Class 12 Biology, this topic from Chapter 1, Sexual Reproduction in Flowering Plants, explains how flowering plants reduce self-pollination and promote cross-pollination through outbreeding devices such as dichogamy, herkogamy, self-incompatibility and unisexuality. It also explores pollen–pistil interaction, including pollen recognition, compatibility, pollen germination and pollen tube growth, showing how the pistil guides and regulates successful fertilisation.

TOPIC PRACTICE

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Easy · Level 1
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  1. One egg cell and two synergids
  2. Three antipodal cells
  3. One central cell and two polar nuclei
  4. Four megaspores

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