(a) Discuss the structure of carpel. (b) Discuss post-fertilization development in angiosperms.
GeneralClass 12AllAnswered 27 Mar 2026
Answer
(a) Carpel structure (female reproductive organ):
- Stigma: Terminal receptive surface for pollen adhesion
- Style: Elongated tube connecting stigma to ovary
- Ovary: Basal chamber containing one or more ovules
- Integuments: Protective layers around ovule
- Nucellus: Megasporangium tissue
(b) Post-fertilization changes:
- Synergids and antipodals: Degenerate
- Ovule: Develops into seed
- Ovary wall: Develops into fruit (pericarp)
- Endosperm: Develops from PEN; provides nutrition
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