speciation

音標(biāo)發(fā)音

Microevolution looks at changes within species overtime — changes that may be preludes to speciation, the origin of newspecies.
物種的微觀進(jìn)化隨時(shí)都在發(fā)生——變化可能導(dǎo)致物種形成，這就是新物種的起源。
Some researchers have argued that speciation rates, both terrestrial and marine, could be much higher in the tropics, making them a "cradle" of biodiversity.
一些專家認(rèn)爲(wèi)，在熱帶地區(qū)的陸地和海域，物種形成的機(jī)率更高，這樣就使熱帶地區(qū)成爲(wèi)了生物多樣性的搖籃。
Researchers usually link speciation to some sort of physical barrier, such as a river or mountain, which divides populations and causes them to evolve independently.
研究人員通常把物種形成與某種物理屏障相聯(lián)系，如河流或山脈，這種屏障分隔種群，使它們獨(dú)立進(jìn)化。

The dominant theory of speciation is that it results from a slow accumulation of genetic mutations.
ECONOMIST: Genes are not all there is to heredity
Boeke says that when more of the yeast genome is synthesized, researchers will be able to use the system to study evolution and speciation.
FORBES: Yeast Goes Synthetic
So the epigenetic hypothesis of speciation has an edge.
ECONOMIST: Genes are not all there is to heredity

the process by which new types of living things are thought to develop from existing ones during evolution

the evolutionary development of a biological species, as by geographical isolation of a group of individuals from the main stock

形態(tài)
Accompanying anions (OAC-, NO3-) had influence on the chemical speciation and transformation process of heavy metals complicatly as the time went on.
陪伴隂離子(OAC-、NO3-)對(duì)土壤中的重金屬賦存形態(tài)隨時(shí)間變化的影響比較複襍。
物種形成

形態(tài)
Speciation analysis of trace elements is new subject.
元素的形態(tài)分析是一新興研究課題。
生物學(xué)
種態(tài)
In this work, a novel comprehensive approach was developed to evaluated selenium speciation in selenium-enriched yeast.
本文提出了一種新穎的、系統(tǒng)的、全麪的對(duì)富硒酵母中硒化學(xué)種態(tài)的研究方法。
種別形成
種形成
物種形成
線系成種