The gametophyte is the dominant stage of the life cycle in both mosses and ferns. in both mosses and ferns, moisture is required for sperm to reach the egg. in mosses, the gametophyte is the dominant stage of the life cycle; in ferns, the sporophyte is the dominant stage of the life cycle. ferns require moisture for sperm to reach the egg, but mosses do not. in mosses, the sporophyte is the dominant stage of the life cycle; in ferns, the gametophyte is the dominant stage of the life cycle. in both mosses and ferns, moisture is required for sperm to reach the egg. the gametophyte is the dominant stage of the life cycle in both mosses and ferns. mosses require moisture for sperm to reach the egg, but ferns do not. in mosses, the gametophyte is the dominant stage of the life cycle; in ferns, the sporophyte is the dominant stage of the life cycle. in both mosses and ferns, moisture is required for sperm to reach the egg.