Question

Which one of the following events takes place after fertilization in angiosperms ?

• A. The pollen grain germinates on the stigma
• B. The pollen tubes enter the embryo sac
• C. Two male gametes are discharged into the embryo sac
• D. The PEN(Primary Endosperm Nucleus) develops into endosperm

Answer 1

The correct option is D The PEN(Primary Endosperm Nucleus) develops into endosperm

Options (a), (b) and (c) represent the events that take place before fertilisation. Primary endosperm nucleus (PEN) is formed after double fertilisation, that is, fusion of egg cell and male gamete and the fusion of the second male gamete with the secondary nucleus to form PEN that develops into endosperm.

So, the correct answer is 'The PEN(Primary Endosperm Nucleus) develops into endosperm'