Question

The process of fusion between male nucleus and egg nucleus is called as
A) Syngamy
B) Triple Fusion
C) Double Fertilization
D) Conjugation

Answer 1

Hint: The fusion of two cells or their nucleus occurs during reproduction. Zygote is formed by the process of fertilization. Two polar nuclei fuse with the pollen grains to form endosperm. This is known as double fertilization. The genetic material fuses with one bacteria and another by the process of conjugation.

Complete Answer:
The process by which two cells fuse together is known as syngamy. It results in a cell that has twice as many chromosomes. Gametes are the two cells which are fused together. This fusion of gametes results in zygote formation. The whole process is called fertilization.
In option B: Triple fusion is defined as a fusion of the male gamete with two polar nuclei inside the embryo sac of the angiosperm in which fusion between two polar nuclei and sperm nucleus.it form three endosperm to help in development of seed. So, this option is not correct.
Option C: Double fertilization takes place in angiosperm it is a trait of flowering plant in this process one female gamete unites with two male gametes. So, this option is not correct.
Option D: in the process of conjugation one bacterium transfers genetic material to another through direct contact. So, this option is not correct.

Therefore, the correct answer is option A.

Note:
An important feature of angiosperms is double fertilization, where two nuclei of sperm cells from each of the pollen tubes go on to fertilise two other cells that belong to the ovary diploid zygote is formed when one of the sperm cells fertilize one of the egg cells. An embryo now develops from this diploid zygote. Syngamy is also referred to as true fusion and generative fertilisation. During the process of syngamy, zygote is produced which forms an embryo and after that the results of syngamy are diploid.