Question

Explain double fertilization.

Answer 1

double fertilization means fertilization takes place two times.

Answer 2

the pollen tubes enter the embryo sac where two male gamet are discharged.one of the male gamete fuses with the egg cell to form zygote. the other male gamet fusses with the dipole secondary nucleus to produce the tripoid primary endosperm nucleus
because of the involvement of two fusion this termed as double fertilization