Statement I is correct: Mosses along with lichens are the first organisms to colonise rocks . Statement II is incorrect: Selaginella is a heterosporous pteridophyte (produces two kinds of spores) . Statement III is incorrect: Coralloid roots in Cycas are associated with N2-fixing cyanobacteria, while mycorrhiza (fungal association) is found in Pinus . Statement IV is correct: The main plant body in bryophytes is the haploid gametophyte , while in pteridophytes, it is the diploid sporophyte . Statement V is correct: In gymnosperms, the male and female gametophytes do not have an independent existence and remain within the sporangia retained on the sporophytes .