Examples include dioecious species where only one sex is present . 例如在雌雄异株种类中仅仅存在单性。
2.
Endodeme is a deme composed of predominantly closely inbreeding but dioecious individuals . 同系同群种是由近亲繁育占优势，但雌雄异株的个体组成的同群种。
3.
This promotes genetic varation in the population especially in plants that are dioecious and moneclous 可以在种群中产生遗传变异，特别是在一些雌雄异体或雌雄同体的植物中。
4.
Examples include the scale leaves of parasitic flowering plants or the reduced stamens in females of dioecious species 例如：寄生有花植物的鳞叶；雌雄异株种类的雌株的退化雄蕊。
5.
It is a dioecious plant . the female tree is different from the male in many aspects , such as karyotype analysis , pattern of peroxidase isozymes and shape of flower 银杏又是严格的雌雄异株，还没有发现雌雄同株现象，其雌雄株在染色体核型，过氧化物同工酶谱等都有较大差异。
6.
Examples include male and female plants in dioecious species , aerial and submerged leaves , alternation of gametophyte and sporophyte stages of a life cycle , and mesophyll and bundle - sheath chloroplasts 例如在雌雄异株物种中的雌性植物和雄性植物，气生的和被水浸没的叶片，生活史中的配子体与孢子体的交替，叶肉和维管束鞘叶绿体等。
7.
This is so because climbing plants are likely to encounter intensive - changing environmental condition during their growth ( especially change of illumination ) . secondly , there is a large proportion ( 30 - 40 % ) of climbing plants which belong to dioecism , and hence a gap between male and female plants on morphology , biological characteristic , economic value and so on . this dissertation focuses on herbaceous climbing plants , perennial or annual species such as dioecious trchosahthes kirilowii maxin and dioscorea opposita thumb , and monoecious luffa cylindrical ( l ) roem , it attempts to discover how climbing plants adapted to various environments and the mechanism of adaptation from aspects of physiological and reproductive ecologies at present , due to overuse of chlorofluorocarbons ( cfcs ) , the ozonosphere has become thinner and thinner , and the ultraviolet - b ( uv - b ) radiation has increased considerably 而攀援植物本身是一类理想的植物行为生态学研究材料：第一，攀缘植物由于受攀缘能力和支柱木资源的限制，在生长过程中通常要遇到强烈变化的环境条件(特别是光照) ；第二，攀缘植物中具有较高比例的雌雄异株类型，通常占地区攀缘植物种类的30 40左右，不同性别的植物在形态学及生物学特性、经济价值等方面存在一定的差距，因此，本文以雌雄异株攀缘植物栝楼( trchosahtheskirilowiimaxim ) (葫芦科多年生草质藤本植物)和山药( dioscoreaoppositathunb ) (薯蓣科薯蓣属植物) 、雌雄同株异花攀缘植物丝瓜[ luffacylindrical ( l ) roem ] (葫芦科一年生攀缘草本植物)为材料，试图从生理生态学及生殖生态学角度揭示攀援植物如何适应不同生境及其机理。
8.
Based on the field investigations and laboratory examinations , a study of the population of the epiphytic dolichomitriopsis diversformis ( mitt . ) nog . in fanjing mountain reveals that its habitats are different among different host trees , but that there lies the common habitat characteristics of not more than 2m height from the bottoms of host trees trunks , less light , high relative humidity , slow wind speed , slow evaporation speed and long time of remaining humid in middle - lower tree bark ; that it is one dioecious moss species , the morphology is remarkably different between its perichaetium and perigonium , the number of its perichaetia is much more than that of its perigonia , its perigonium is difficult to find out , its sporophyte is upright , its seta is long and thin , its capsule is regular long oval and its calyptra is cucullate 摘要通过野外调查和室内观测对贵州省梵净山树附生尖叶拟船叶藓种群的研究表明，其生境因其所附生的树种不同而有所不同，但具有共同特点：附生在树干下部距地面2m高的范围之内，光照弱、湿度大、风速小、蒸发量小、中下部树皮保持湿润的持续时间长；其为雌雄异株藓种，雌、雄器苞形态差异明显，雌器苞数量多，雄器苞数量少并且难于发现，孢子体直立，蒴柄细长，孢蒴规则长卵形，蒴帽兜形。
