What occurs in the life cycle of a moss but not in the life cycle of a gymnosperm?

In mosses, the sporophyte releases haploid spores. Each spore grows into a gametophyte, which produces sperm and eggs. Gymnosperms also form a diploid zygote when sperm and egg fuse and alternate between generations, so B and D are not unique to mosses. Cones are characteristic of gymnosperms, not mosses.

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