Number of nuclei taking part in double fertilization is

Where does the process of fertilization occur in flowering plants?

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

Which one of the following events in a botanical garden is never directly influenced by light?

In angiosperms, the fusion of a male gamete with the secondary nucleus is considered as "second fertilization" because

Double fertilisation is exhibited by