They show a heteromorphic alternation of generations , the gametophyte eging the dominant generation 苔藓植物具有明显的世代交替现象，配子体在世代交替中占优势。
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Alternation of generations the occurrence of two , or occasionally more , generations during the life cycle of an organism 世代交替：有机体生活史中出现二个或者两个以上世代的现象。
3.
Hofmeister , wilhelm friedrich benedict ( 1824 - 77 ) german botanist who first demonstrated the alternation of generations in lower plants 霍夫美施塔：是德国植物学家，第一个发现低等植物中具有世代交替的现象。
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In organisms showing alternation of generations , the gametes may be produced by mitosis in the haploid generation , or by meiosis in the diploid generation and give rise directly to gametes or gamete - producing cells 在表现出明显世代交替的生物体中，配子可能是由单倍体世代发生有丝分裂产生，亦可由二倍体世代减数分裂直接产生配子体或配子母细胞。
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At the same time , we studied the distribution patterns of the young , middle - aged and old individuals respectively in the three populations as well as in other several concomitant species in the communities in which e . chloranthoides lives 三个种群的世代长度约为6一7a ，世代交替的时间较短。 4 、移动平均法对三个种群未来数量的增长趋势预测的结果表明，在未来2a 、 5a内，绪乞
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Like thallose liverworts , the hornworts have an alternation of generations in which the gametophyte is a dorsiventral flattened green phallus and the saprophyte is an upright structure that has a foot embedded in the gametophytes , from which it draws nutrition 与叶状体植物地钱一样，角苔具有明显的世代交替， ，配子体在世代交替中占优势，孢子体占劣势且利用其基足插入配子体的组织中吸取养料，以供孢子体生长。
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But there is a more hopeful prospect : that mr abe , representing a generational change , pushes forward reforms at home and reaches for a bigger role abroad , while undoing the damage to japan ' s relations with its neighbours caused by mr koizumi ' s stubborn visits to tokyo ' s yasukuni shrine , a symbol of japan ' s past militarism 但还存在一个较为乐观的可能性，那就是代表着世代交替的安倍在日本国内推行改革，并在国外发挥更大的作用，同时消除因小泉固执地参拜位于东京、象征着日本军国主义历史的靖国神社给日本与其邻国关系造成的伤害。
