How is double fertilisation different from the normal fertilisation in plants?

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Solution

Normal fertilization Double fertilization

It is the union of two compatible gametes. It is union of one male gamete with egg and the other male gamete with secondary nucleus of the same embryo sac.

It occurs in almost all eukaryotes. It is restricted to angiosperms only.

Normal fertilization produces a diploid zygote. Double fertilization produces a diploid zygote and a triploid primary endosperm cell.

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Normal fertilization	Double fertilization
It is the union of two compatible gametes.	It is union of one male gamete with egg and the other male gamete with secondary nucleus of the same embryo sac.
It occurs in almost all eukaryotes.	It is restricted to angiosperms only.
Normal fertilization produces a diploid zygote.	Double fertilization produces a diploid zygote and a triploid primary endosperm cell.