A multicellular, filamentous alga exhibits a type of sexual life cycle in which the meiotic division occurs after the formation of zygote. The adult filament of this alga has

In a multicellular filamentous alga (e.g., Ulothrix), the sexual life cycle have meiotic division after the zygote (2n) formation. It means meiosis in zygote will produce haploid spores or vegetative cells (n) and when these vegetative cells undergo asexual reproduction the gametophyte or gametangia formed will be haploid (n) too.