By double fertilization is formed:

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(A) Double fertilization involves two fusion events: syngamy (fusion of one male gamete with the egg cell to form a zygote) and triple fusion (fusion

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Endosperm

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(A) Double fertilization involves two fusion events: syngamy (fusion of one male gamete with the egg cell to form a zygote) and triple fusion (fusion of the second male gamete with two polar nuclei to form the Primary Endosperm Nucleus $(PEN)$).The $PEN$ subsequently develops into the endosperm, which provides nutrition to the developing embryo.Therefore, double fertilization is essential as it ensures the formation of nutritive tissue $(endosperm)$ only when embryo formation is guaranteed.

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