Question:
Double fertilization is
Double fertilization is
Updated On: Apr 24, 2026
- Fusion of two male gametes of a pollen tube with two different eggs
- Fusion of two male gametes with one egg
- Fusion of one male gamete with two polar nuclei
- Syngamy and triple fusion
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The Correct Option is D
Solution and Explanation
Double fertilization is a characteristic feature of angiosperms (flowering plants) and involves two key processes, syngamy and triple fusion.
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Understanding Double Fertilization:
- Double fertilization is the process in which one male gamete fuses with an egg cell to form a zygote (syngamy), and the other male gamete fuses with two polar nuclei to form a triploid cell, which will develop into endosperm (triple fusion).
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Explanation of Options:
- Option 1: Fusion of two male gametes of a pollen tube with two different eggs - Incorrect. In double fertilization, one male gamete fuses with the egg, not separate eggs.
- Option 2: Fusion of two male gametes with one egg - Incorrect. Only one male gamete fuses with one egg cell.
- Option 3: Fusion of one male gamete with two polar nuclei - Partially Correct. This describes triple fusion but not syngamy.
- Option 4: Syngamy and triple fusion - Correct. This option accurately describes both processes involved in double fertilization.
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Conclusion:
- Therefore, the correct answer is Syngamy and triple fusion, which captures the complete mechanism of double fertilization in angiosperms.
In conclusion, double fertilization ensures both the formation of a diploid zygote and the nourishment of the developing embryo via the triploid endosperm, making it a unique and vital process in the life cycle of flowering plants.
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