Triple fusion in angiosperms is the fusion of the second sperm with:

The phenomenon of syngamy (fertilization) in angiosperms was discovered by

Endosperm is the result of

Differentiate between the following:
$(i)$ Red algae and brown algae
$(ii)$ Liverworts and moss
$(iii)$ Homosporous and heterosporous pteridophytes
$(iv)$ Syngamy and triple fusion

How many nuclei are present in the embryo sac after fertilization?

Fusion of two dissimilar gametes is called