EVERYDAY SCIENCE

Detailed explanation-1: -Double fertilization is a complex process where out of two sperm cells, one fuses with the egg cell and the other fuses with two polar nuclei which result in a diploid (2n) zygote and a triploid (3n) primary endosperm nucleus (PEN) respectively.

Detailed explanation-2: -Double fertilisation is a characteristic feature of angiosperms. It is a fusion of two male gametes brought by a pollen tube to two different cells of the same female gametophyte to produce zygote and endosperm.

Detailed explanation-3: -Answer and Explanation: The synergid cells do not directly involve in the process of double fertilization. The pollen tube transfers two male gametophytes inside the synergid’s cytosol. The synergides (specialized cells around the eggs) disappear just during the fertilization procedure.

Detailed explanation-4: -Gametogenesis is the process of formation of gametes for fertilization. It is the event of pre-fertilization.