Double fertilization is

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(D) Double fertilization is a characteristic feature of angiosperms.It involves two distinct fusion events:$1$. Syngamy: One male gamete fuses with th

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Syngamy and triple fusion

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(D) Double fertilization is a characteristic feature of angiosperms.It involves two distinct fusion events:$1$. Syngamy: One male gamete fuses with the egg cell to form a diploid zygote $(2n)$.$2$. Triple fusion: The second male gamete fuses with the two polar nuclei (or the secondary nucleus) to form a primary endosperm nucleus $(PEN)$,which is triploid $(3n)$.Therefore,double fertilization is the combination of syngamy and triple fusion.

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