有性生殖

IN ALL species that practise sexual reproduction, males and females show gender-specific behaviours.

在所有有性生殖的物种中，雄性和雌性表现出各自性别特异的行为。

First are those individuals or couples who lack the gametes needed for sexual reproduction.

首先是那些缺少有性生殖所必须的配子的个人和夫妻。

Here we report the simulation of populations with sexual reproduction, mutation and dispersal.

本期Nature介绍了中性理论的一种新形式，增添了将有性生殖、突变和扩散等因素考虑在内的内容。

Scientists currently have developed several competing hypotheses to explain the evolution of sexual reproduction.

目前，科学家们已形成了几种相互竞争的假说来解释有性生殖的进化。

Fern spores and spermatophyte pollen have major roles in plant sex reproduction.

蕨类植物孢子与种子植物花粉在有性生殖过程中都具有重要的作用。

Meiosis is the most important reproduce and favoured by organisms. The key events of meiosis identified are pairing, synapsis, genetic recombination, segregation.

李丽减数分裂是生物体重要的有性生殖方式，它提供来自母本和父本的基因信息，产生具有生物多样性的子代，使其能够适应环境的变化而不断进化。

Fish andtogenesis is a kind of secial sexual development which is controlled by male nucleus and it is an important part of fish unisexual development.

雄核发育是在雄核控制下发育的一种特殊的有性生殖方式，它是鱼类单性发育的重要组成部分。

Of 30,000 known Ascomycetes only 5,000 have been 'connected' to their anamorphs - results often 'messy' eg teleomorph genera, Nectria and Gibberella, both have anamorphs which have been classified in the anamorph genus Fusarium Many anamorphs (85%) have no known teleomorph - are termed Deuteromycetes.

有时将有性与无性联系容易，许多情况下难甚至做不到，因为有的菌丧失了有性生殖的能力。30 000种已知的子囊菌只有5 000种与无性态挂上了勾，结果往往是杂乱的，如有性阶段的丛剌壳属和赤霉属的无性阶段都是镰霉属。

Assortative mating Sexual reproduction in which the pairing of male and female is not random.

选型交配：有性生殖中配对的雌雄双方不足随机交配的现象。

Nevertheless, it has recently been shown in experiments with Chlamydomonas algae that sex can remove the speed limit on evolution.

然而，最近以衣藻为材料的实验表明，有性生殖可以移除对进化的速度限制。

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。