查询词典 sexual reproduction

Agamogenesis , sexual reproduction ,a great deal , short period

无性繁殖，有性繁殖，繁殖量大周期短

These species time their sexual reproduction with periods of environmental uncertainty, and reproduce asexually when conditions are more favourable.

这些物种按环境不确定的时期安排它们有性生殖的时间，当条件较为有利时它们进行无性繁殖。

The sexual reproduction of Rehmannia glutinosa was dominantly xenogamous, while the setting rate of autogamy was about 1.1%.

从不同处理下结实率实验看，地黄的有性繁殖主要依靠异花授粉，其自花授粉的结实率为1.1%。

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。

In evolutionism, the borrowed concepts of mutation and sexual reproduction spawn the art.

从变异和有性繁殖的进化理论中借用的概念萌芽催生了这门艺术。

It is much fast than sexual reproduction because it does not include the process of forming a gametocyte.

而合子是由亲本产生有性生殖细胞，经过两性生殖细胞的结合，成为合子。

Male gametogenesis is one of the key steps in plant sexual reproduction and is essential for the alternation between the diploid sporophytic phase and haploid gametophytic phase in the life cycle of higher plants.

植物雄配子体发生和发育是有性生殖的关键步骤之一，是高等植物通过有性生殖进行世代交替所必需的。

Pollen is a highly reduced organism that plays a great role in plant sexual reproduction as the male gametophyte.

花粉是高度退化的生物体，在植物有性生殖过程中具有重要作用。

Peronosporales An order of the OOMYCOTA characterized by sexual reproductionby zoospores and sexual reproduction by zoospores produced from oospores.

霜霉目：以游动孢子的有性生殖和由卵孢子产生的游动孢子的有性生殖为特征的卵菌门的一个目。

The formation of such a conjugation pair may be concerned with selfing; the sexual process may be a primitive type of sexual reproduction.

这种接合对的出现可能与自接型有关，其有性过程可能是一种原始的有性生殖类型。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。