Assertion: Syngamy results in the formation of endosperm.
Reason: Triple fusion results in the formation of embryo.

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Answer

D

Explanation

• After entering one of the synergids, the pollen tube released the two male gametes into the cytoplasm of the synergid.
• One of the male gametes moves towards the egg cell or oosphere and fuses with its nucleus thus completing the syngamy. This results in the formation of a diploid cell, the zygote.
• The other male gamete moves towards the two poiar nuclei located in the central cell and fuses with them to produce a triploid primary endosperm nucleus (PEN). As this involves the fusion of three haploid nuclei it is termed triple fusion.