What is double fertilization?
BiologyClass 10CBSEAnswered 28 May 2026
Answer
Double fertilization is unique to flowering plants (angiosperms) two male nuclei from the same pollen grain fertilize different cells simultaneously.
Male nucleus 1 + Egg cell → Zygote (2n) → Embryo
Male nucleus 2 + 2 Polar nuclei → Endosperm (3n) → Food reserve
- Discovered by Nawaschin (1898).
- Ensures efficient seed development embryo gets both genetic material and nourishment.
Summary: Double fertilization in flowering plants produces both the embryo and the nutritive endosperm from a single pollen grain.
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