EVERYDAY SCIENCE

Detailed explanation-1: -It is a process involved in the sexual reproduction of angiosperms. Triple fusion is a fusion that involves a sperm nucleus and two polar nuclei which occurs in the double fertilization in a seed-bearing plant that results in the endosperm formation.

Detailed explanation-2: -Solution : In angiosperms, triple fusion is required for the formation of endosperm. Triple fusion refers to the vegetative fertilisation, i.e. the fusion of nucleus of a male gamete with the two polar nuclei or the diploid secondary (fusion) nucleus.

Detailed explanation-3: -In angiosperms, the endosperm develops from the triploid primary endosperm nucleus which is formed as a result of vegetative fertilisation, triple fusion or fusion of a male gamete with secondary nucleus of the central cell.

Detailed explanation-4: -The result of the triple fusion is the formation of a triploid nucleus called a primary endosperm nucleus. This nucleus by repeated mitotic divisions gives rise to the formation of the endosperm This endosperm provides nourishment to the developing embryo.

Detailed explanation-5: -Thus, after triple fusion, the central cell becomes triploid (3n) and is called the primary endosperm cell (PEC).