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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.

Practice questions

01 Which cells constitute the egg apparatus at the micropylar end of the embryo sac?

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