<P> Fertilized eggs become zygotes, which develop into sporophyte embryos inside the archegonia . Mature sporophytes remain attached to the gametophyte . They consist of a stalk called a seta and a single sporangium or capsule . Inside the sporangium, haploid spores are produced by meiosis . These are dispersed, most commonly by wind, and if they land in a suitable environment can develop into a new gametophyte . Thus bryophytes disperse by a combination of swimming sperm and spores, in a manner similar to lycophytes, ferns and other cryptogams . </P> <P> The arrangement of antheridia and archegonia on an individual bryophyte plant is usually constant within a species, although in some species it may depend on environmental conditions . The main division is between species in which the antheridia and archegonia occur on the same plant and those in which they occur on different plants . The term monoicous may be used where antheridia and archegonia occur on the same gametophyte and the term dioicous where they occur on different gametophytes . </P> <P> In seed plants, "monoecious" is used where flowers with anthers (microsporangia) and flowers with ovules (megasporangia) occur on the same sporophyte and "dioecious" where they occur on different sporophytes . These terms occasionally may be used instead of "monoicous" and "dioicous" to describe bryophyte gametophytes . "Monoecious" and "monoicous" are both derived from the Greek for "one house", "dioecious" and "dioicous" from the Greek for two houses . The use of the "oicy" terminology is said to have the advantage of emphasizing the difference between the gametophyte sexuality of bryophytes and the sporophyte sexuality of seed plants . </P> <P> Monoicous plants are necessarily bisexual (or hermaphroditic), meaning that the same plant has both sexes . The exact arrangement of the antheridia and archegonia in monoicous plants varies . They may be borne on different shoots (autoicous or autoecious), on the same shoot but not together in a common structure (paroicous or paroecious), or together in a common "inflorescence" (synoicous or synoecious). Dioicous plants are unisexual, meaning that the same plant has only one sex . All four patterns (autoicous, paroicous, synoicous and dioicous) occur in species of the moss genus Bryum . </P>

Name 3 types of bryophyta. what is unique about their life cycle