Question

A unique phenomenon observed in the female gametophyte of angiosperms is:

• A. Fusion of gametes
• B. Diploid endosperm
• C. Entry of pollen tube
• D. Double fertilization

Answer 1

The correct option is D Double fertilization

Double fertilization is a complex fertilization mechanism of flowering plants (angiosperms). This process involves the joining of a female gametophyte (megagametophyte, also called the embryo sac) with two male gametes (sperm).

One male gamete fuses with egg forming zygote (2n) and the process is called syngamy. And the other male gamete fuses with two polar nuclei forming endosperm (3n) and the process is called triple fusion.