The answer is Haploid spores germinate to give rise to protonema, which later develops into a sporophyte.
A protonema (plural: protonemata) is a
thread-like chain of cells that forms the earliest stage (the haploid phase) of a bryophyte life
cycle..
A haploid gametophyte ( each of whose cells contains a fixed number of
unpaired chromosomes) gives rise to a diploid sporophyte,.
Gametophytes produce haploid sperm and eggs which fuse to form diploid zygotes
that grow into sporophytes.
