Question

Double Fertilization Is _________.

• A. Syngamy and triple fusion
• B. Fusion of two male gametes with one egg
• C. Fusion of one male gamete with two polar nuclei
• D. Fusion of two male gametes of pollen tube with two different eggs

Answer 1

The correct option is A

Syngamy and triple fusion

The correct option is A.

Explanation of the correct option:

1. One of the complex fertilization characteristics found in flowering plants, that is, angiosperms is double fertilization.
2. In the process, two male gametes combine with one female gamete.
3. Fertilization of one male gamete takes place with the egg resulting in the development of a zygote, while the other combines with two polar nuclei resulting in the development of an endosperm.
4. This process comprises the joining of a female gametophyte, that is, the embryo sac with the two male gametes, that is, sperms.
5. The process of the combination of the haploid sperm with the haploid egg resulting in the formation of a zygote is known as syngamy.
6. The other sperm forms a triploid nucleus by combining with the two haploid polar nuclei, called triple fusion.
7. This massive cell of the gametophyte then gets converted into the endosperm, which offers nourishment to the developing embryo.
8. As endosperm is an outcome of the fusion of three haploid nuclei, it is called triple fusion.

Final answer: Double fertilization is syngamy and triple fusion.