First, there is speciation (species-splitting or cladogenesis), caused by geographical isolation or some other mechanism.

首先，因地理隔离或其它一些机制导致形成（分裂或系枝进化）。

Polyploidy is a mechanism often attributed to causing some speciation events in sympatry.

多倍性常被当作引起在同一地区并存的发生形成事件的一机制。

Many types of animal have now vanished from the earth.

许多动现已从地球上绝迹。

That species disappeared in the Ice Age.

那个早在冰河时期就绝迹了。

This island is maintained as a sanctuary for endangered species.

那个岛继续作为濒的保护区。

LIN Yu-chang Area Serai, intertwined vines and plant species richness.

景区林郁苍茏，藤蔓交织，植丰富。

The book described the adaptation of desert species to the hot conditions.

这本书描绘了沙漠对炎环境的适应。

14 per cent of primate species are highly endangered.

14% 的灵长类处于高度濒状态。

It is believed that this differential toxicity is due to species-specific toxicokinetics.

据认为，这一差别的性是由于。

The rabbit is a relatively recent introduction in Australia.

兔子是相对较新引入澳大利亚的。

The Antarctic species have few special adaptations for polar life.

南极的对极地生活几乎没有什么特别的适应性改变。

The phylogenic tree of TFL1 homologs is almost accordance with the relative of those plants.

TFL1 蛋白的系统发育树基本符合的亲缘关系。

The arrival of this South American predator threatened the survival of native species.

这南美肉食动的到来威胁到了当地的生存。

In the stream with strong bed load movement there is no benthic macroinvertebrate.

河势散乱且河床运动剧烈的支流丰度和密度均很低甚至为零，生态条件差。

Differential toxicity is seen in different animal models.It is believed that this differential toxicity is due to species-specific toxicokinetics.

不同摄入同有质效果是不同的，性强度与该的代动力学密切相关。

In contrast to homoploid hybrid species,polyploid species are easily diagnosed because of chromosome number changes associated with genome doubling.

与同倍杂合体相比，因为与基因组加倍相关的染色体数目的变化,多倍杂合体很容易判断。

The community has an outstanding dominant species and the arborous layer possesses a comparatively high diversity index.

群落的优势显著，乔木层的多样性指数较高，各样地间的植类具有一定的相似性。

It is spread by the bite of an infected tsetse fly (Glossina Genus), a species native to the African continent.

它通过非洲大陆当地特有的即受感染的采采蝇（舌蝇属）的叮咬传播。

The laws are designed to protect endangered species like badgers and otters, whose fur used to be favoured by sporran makers.

这项法律是为了保护獾与水獭等濒，过去毛皮袋的制作者喜欢使用牠们的毛皮。

Safe for the moment from predaceous leopard seals, chinstrap penguins are the second most abundant species in Antarctica and the sub-Antarctic.

可以暂时的安全防备海豹的猎杀，帽企鹅是第二的最多丰富的在南极洲和亚南极洲。