Double fertilization is the fusion of

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(D) Double fertilization was discovered by $S. G. Nawaschin$ $(1898)$ and $Guignard$ in $Lilium$ and $Fritillaria$. Double fertilization is a characte

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One male gamete with egg and other with secondary nucleus

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(D) Double fertilization was discovered by $S. G. Nawaschin$ $(1898)$ and $Guignard$ in $Lilium$ and $Fritillaria$. Double fertilization is a characteristic feature restricted only to angiosperms.When the pollen tube enters the ovule,it releases two male gametes into the embryo sac. These gametes fuse with two different structures in the same female gametophyte:$1.$ Syngamy: Fusion of one male gamete with the egg cell to form a diploid zygote $(2n)$.$2.$ Triple Fusion: Fusion of the second male gamete with the two polar nuclei (or the secondary nucleus) to form the primary endosperm nucleus $(PEN)$,which is triploid $(3n)$.

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