Question

Difference between syngamy and triple fusion.

Answer 1

Hint: Syngamy and triple fusion are two incidents of sexual reproduction of plants. Both syngamy and triple fusion are involved within the fusion of cells.

Complete answer:
The ultimate destination of the pollen tube is to reach the female gametophyte & release the male gametes that can ensure fertilization. In angiosperms, double fertilization is an important feature which involves fusion of one male gamete with the egg and the other male gamete fuses with the fusion product of the polar nuclei (secondary nucleus).
The difference between syngamy and triple fusion are:

Syngamy	Triple fusion
The fusion of the male and female gametes during fertilization is named syngamy.	The fusion of the sperm cell with the two polar nuclei during double fertilization is called triple fusion.
Syngamy is a generative fertilization.	Triple fusion is a vegetative fertilization.
It produces a zygote which forms the embryo.	It produces endosperm cells that develop into the endosperm.
The end product is diploid structure.	The end product is a triploid structure.
Both male and female gametes are involved within the syngamy.	Male gametes are only involved in the triple fusion.
Syngamy occurs in animals and plants.	Triple fusion occurs in angiosperms.

Additional Information:
On the idea of the structure of the gametes, syngamy is often divided into three types: isogamy, anisogamy, and hologamy. The gametes in isogamy are both morphologically and physiologically similar to each other. In anisogamy or heterogamy, the gametes are morphologically and physiologically different from one another. In hologamy, two organisms act as gametes.

Note:
The triploid nucleus serves as the primary endosperm nucleus, giving rise to the endosperm of the seed, which stores nutrients of the seed. It is often noted that syngamy is additionally mentioned as true fusion.