Archegonia is diploid. Antheridia is haploid. They are found in bryophytes or ferns.
Intercalated diploid phase means a type of diploid molecule that binds to DNA and inserts itself in to the DNA structure.
xylem
The Sporophyte life cycle is the dominant stage in Ferns (vascular non-seed plants)
prothallus.
It is the rhizoid, I think.
The structure that fern roots grow from are rhizomes.
The gametophyte of moss is the dominant structure
cycopsida is palm like structure
Sporangium
diploid
They have no "vascular system".