| 1. | 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。 |
| 2. | 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。 |
| 4. | The concept of an alternation of generations can be extended to the flowering plants , in which the embryo sac and pollen represent the much reduced famale and male gametophyte generations respectively
这个概念也可以运用在有花植物上，由胚囊和花粉各自表达雌雄配子体世代。 |
| 5. | 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。 |
| 6. | 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。 |
