Next. The following are all true concerning the sporophyte or gametophyte generations in flowering plants except: A. the flower is composed of gametophyte tissue only B. the sporophyte generation is dominant C. the sporophyte generation is what we see when observing a plant D. unlike ferns, the gametophyte generation...he following are all true concerning the sporophyte or gametophyte generations in flowering plants except: A. the flower is composed of gametophyte tissue only. B. the sporophyte generation is dominant.