BOTANY

Detailed explanation-1: -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. The fusion process occurs in the embryo sac of the angiosperms.

Detailed explanation-2: -Triple fusion is the fusion of the male gamete with two polar nuclei inside the embryo sac of the angiosperm. This process involves the fusion of three haploid nuclei, hence it is known as triple fusion. It results in the formation of the endosperm.

Detailed explanation-3: -Triple fusion means fusion involving two polar nuclei in the embryo sac and a nucleus from the pollen grain that results in the formation of the endosperm. It is a peculiar characteristic in double fertilisation where diploid zygote and a triploid endosperm is formed.

Detailed explanation-4: -The process of Triple Fusion takes place when one male gamete fuses with the two polar nuclei to form a triploid primary endosperm nucleus.

Detailed explanation-5: -Final answer: The formation of endosperm takes place by the fusion of two polar nuclei and one male gamete.