What are the significances of double fertilization?

Answer: Significance of double fertilization:

1. It is a unique feature of angiosperms in which both male gametes take part in fertilization.
2. Syngamy (one male gamete + egg) forms the diploid zygote, which develops into the embryo.
3. Triple fusion (second male gamete + diploid secondary nucleus) forms the triploid primary endosperm nucleus, which develops into the endosperm — the nutritive tissue for the developing embryo.
4. Endosperm forms only if fertilization occurs, so food is not wasted on ovules that are not fertilized.
5. Endosperm, having genes of both parents, gives vigour to the seedling; double fertilization also restores the diploid condition and brings about variation.