有性生殖的

Phenotypic plasticity and genetic differentiation are the two major strategies that alien invasive plants can adapt habitat heterogeneity.The polymorphism of invasive plants and the diversity of their dispersal way enable them occupying invaded habitat quickly,and dispersing with a far range.The breeding strategies that agamogenesis and amphigenesis can coexist and trade off according to the habitat and invasive stage can not only promote the invasive population erupted massively,but also directly affect the dispersal mechanism and regulate the genetic structure of the population.

表型可塑性和遗传分化是外来入侵植物对生境异质性的两种适应策略；散布体多态型和散布途径多种化，使外来入侵植物迅速占领入侵生境，并进行远距离扩散；无性生殖和有性生殖并存，并根据生境和入侵阶段权衡的繁育对策不仅使入侵种群大面积暴发成为可能，而且直接影响散布机制并对种群遗传结构具有调节作用。

It is suggested that autotetraploidy rices are better females in the distant hybridization due to the fact that they are weaker in sexually reproductive ability.

结果暗示由于同源四倍体水稻具有比较弱的有性生殖能力，在远缘杂交中它们是比较好的杂交母本。

A third theory is that sex evolved as a form of cannibalism.

第三个理论是，有性生殖是作为嗜食同类的一种形式演化的。

It is showed that sexual reproduction in triploids is not very capable and to plant more triploids of Populus tomentosa will be profitable for the environment because of less catkin and pollen.

结果表明三倍体毛白杨的有性生殖能力较低，因此，种植三倍体毛白杨将会减少毛白杨早春散粉和飞絮对环境的污染。

Isogamy The sexual fusion of gametes of similar size and form. It occurs in fungi and some protoctists.

同配生殖：是形态大小相同的配子间进行的有性生殖，发生在真菌和原生生物中。

Processes originated One-celled life reproduces by splitting, but sexual reproduction is much

一个单细胞的生命藉分裂而产生新细胞，那么有性生殖会是更复杂的问题了。

Sagitta and L. virgaurea were suppressed due to interspecific competitions on the grassland, therefore the reproduction of the two plants mainly dependen on seeds.

箭叶橐吾和黄帚橐吾，在自然条件下，其克隆生长的根状茎，受到了草场其它生物的竞争而被抑制，主要进行有性生殖。

Delph L F Sexual-differental resource allocation patterns in the subdioecious shrub Iiebe subalpina 10.2307/1938271 Ecology , 1990,4

王仁忠 不同生境条件下羊草种群无性系和有性生殖特征的比较研究应用生态学报， 2001，3

The great mass of normal pollen grains make pollinationpossible.

在人工授粉条件下，观察了小叶杨有性生殖过程的形态发育及其持续时间，结果如下：除正常花粉外，有异常和败育花粉，但不影响传粉和受精。

The oospores often remain dormant for a period of time to germinate, which comfines the research of inheritance and variation behavior of the oospores.

卵孢子通常休眠一段时间后才萌发，这阻碍了大豆疫霉菌有性生殖后代毒性的遗传和变异研究。

This paper demonstrated the impact on the environment today, an important factor is Education.

本文主要展示了当今影响环境的一个重要因素——教育。

Article 16 The power to interpret these Procedures shall remain with the Ministry of Agriculture and CAA.

第十六条本程序由农业部、国家认证认可监督管理委员会负责解释。