The discoverer of the process of double fertilization is........

The following figure shows a mature embryo sac. Where do the male gametes fuse?

Double fertilization was discovered by

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

In angiosperms,the endosperm is formed from:

In angiosperms,the haploid,diploid,and triploid structures of a fertilized embryo sac sequentially are: