In mosses does the Archegoniophore develop into sporophyte?

Solution:

In mosses, the male gametangiophore is an antheridiophore and the female gametangiophore is an archegoniophore. The antheridiophore contains antheridia full of flagellated sperms and the archegoniophore contains archegonia containing a single haploid egg. During mating, the sperm swim up to reach the archegonium and fertilize the egg. The diploid zygote thus formed divides by mitosis and develops into a diploid sporophyte plant.

So, in mosses, it is a zygote that develops into a sporophyte.