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(C) Double fertilisation is a characteristic feature of angiosperms.It involves two fusion events:$1$. Syngamy: One male gamete $(n)$ fuses with the e

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Triploid nucleus

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(C) Double fertilisation is a characteristic feature of angiosperms.It involves two fusion events:$1$. Syngamy: One male gamete $(n)$ fuses with the egg cell $(n)$ to form a diploid zygote $(2n)$.$2$. Triple fusion: The second male gamete $(n)$ fuses with the two polar nuclei $(n + n)$ to form the primary endosperm nucleus $(PEN)$,which is triploid $(3n)$.Therefore,the process results in the production of a triploid nucleus $(3n)$ in the form of $PEN$.

Double fertilisation results in the production of

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