Differentiate between the following:- (iv) syngamy and triple fusion
Explanation Syngamy: Syngamy is also known as true fertilization and involves the fusion of a male and a female gamete to give rise to a zygote. Triple fusion: Triple fusion is seen in angiosperms. An angiosperm embryo sac at its eight nucleate stage contains three antipodal cells , two polar nuclei , an egg cell and two synergids. The pollen tube that enters the embryo sac through the micropylar end releases two male gametes into the sac. One of the gametes fuses with the egg resulting in formation of zygote while other gamete fuses with the two polar nuclei. This process where three haploid nuclei fuses is called triple fusion. Triple fusion give rise to a triploid cell which divides to form the endosperm. Final Answer Syngamy is the true fertilization that involves the union of a male and a female gamete to give rise to a zygote. Triple fusion is exclusively seen in angiosperms. It involves the fusion of a male gamete with the two polar nuclei to give rise to a triploid cell that divides to form the endosperm.
