In angiosperms,the endosperm is formed by:

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(C) In angiosperms,the process of double fertilization involves the fusion of one male gamete with two polar nuclei (or the secondary nucleus) to form

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Division of fused polar nuclei and male gamete

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(C) In angiosperms,the process of double fertilization involves the fusion of one male gamete with two polar nuclei (or the secondary nucleus) to form the Primary Endosperm Nucleus $(PEN)$.This process is known as triple fusion.The $PEN$ subsequently undergoes repeated mitotic divisions to develop into the endosperm,which provides nourishment to the developing embryo.Therefore,the endosperm is formed by the division of the product of the fusion of two polar nuclei and one male gamete.

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