speciation
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n. [进化] 物种形成
n.
物种形成；
英英释义
speciation[ ,spi:ʃi'eiʃən ]
n.the evolution of a biological species
双语例句
用作名词(n.)
The Mariana Mallard arose from hybrid speciation.
马里亚纳野鸭就是杂交物种形成产生的。
权威例句
Genetics and speciation.Arsenic speciation in the environment
Species Concepts and Speciation Analysis
"Patterns of speciation in Drosophila"revisited.
Geographic variation, speciation, and clines.
The evolutionary genetics of speciation.
Models of speciation by sexual selection on polygenic traits
Sequential extraction procedure for the speciation of particular trace elements
Some genetic consequence of ice ages, and their role in diverging and speciation
Some genetic consequences of ice ages, and their role in divergence and speciation ☆
speciation (n.)
1906; see species + -ation. The verb speciate is a back-formation attested by 1961.
1. Microevolution looks at changes within species overtime — changes that may be preludes to speciation, the origin of newspecies.
物种的微观进化随时都在发生——变化可能导致物种形成，这就是新物种的起源。
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2. Some researchers have argued that speciation rates, both terrestrial and marine, could be much higher in the tropics, making them a "cradle" of biodiversity.
一些专家认为，在热带地区的陆地和海域，物种形成的机率更高，这样就使热带地区成为了生物多样性的摇篮。
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3. 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.
研究人员通常把物种形成与某种物理屏障相联系，如河流或山脉，这种屏障分隔种群，使它们独立进化。
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4. Genetic analysis is showing that life is much more complex than that: all kinds of hidden mechanisms have allowed speciation to occur as a wandering from branch to branch.
基因分析表明生命的进化远比达尔文的生命之树要复杂的多：所有种类的潜在机制都允许物种的形成从一个“树枝”跨越到另一个“树枝”上而发生。
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5. Nevertheless, the scientific literature does contain reports ofapparent speciation events in plants, insects and worms.
不过，科学文献中确实存在关于植物、昆虫和蠕虫的明显的物种形成报告。
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6. But the fossil record of placental mammals is reliable and does not record a speciation until later.
但是胎盘类哺乳动物的化石记录是可靠的，却没有在那之前记录下物种进化的现象。
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7. The phylogenetic analysis was conducted by international researchers to determine the origin, evolution, patterns of speciation, and unique features in genome divergence among primate lineages.
这项系统发育研究由国际范围内的研究者共同承担，旨在揭示灵长类的起源、进化、物种形成模式和基因组谱系分化中的独特之处。
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8. Researchers say the phenomenon provides evidence that differences in sensory perception--not just geography--can spark speciation.
研究人员说，这种现象提供证据证明在感官的感觉上的差异——不仅仅是地理位置——可能导致物种形成。
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9. Speciation is probably fairly rare and in many cases might takecenturies.
新物种的出现是相当罕见的，很多情况下这一过程需要持续几百年。
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10. Then, sometime between 1.3 million and 2 million years ago, carnation speciation exploded.
然后，大约是在1300，000年至2000，000年前，石竹科物种形成爆发了。
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11. Trevor Price, an evolutionary ecologist at the University of Chicago in Illinois, says that the authors make a compelling case for speciation driven by sensory changes.
TrevorPrice是伊利诺斯州芝加哥大学的一名进化生态学家，他说，由于感官变化驱使的物种形成，作者提出充分的理由，令人佩服。
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12. Their molecular clock data suggest a much earlier speciation, perhaps prompted by the breakup of the ancient supercontinent of Gondwana around 120 million years ago.
他们的分子钟数据证实更早的时候就出现了物种分化，可能是1亿2千万年前冈瓦纳古陆的破裂引发的。
article.yeeyan.org
13. Issue regarding the Homo sapiens speciation and evolution has been intensively and extensively focused on.
人类的物种形成与进化问题一直是研究的一个焦点。
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14. Analyses of the age distribution of duplicate genes in diverse flowering plants indicate that essentially all may be paleopolyploids, but this should not be equated with the polyploid speciation rate.
分析在不同开花植物的重复基因的年龄分布表明，基本上可能都是古多倍体，但这不应当等同于多倍体的物种形成率。
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15. Indeed, many think that regulatory changes are at the heart of speciation and may have played a large role in the evolution of humans from their predecessors.
确实，许多人相信调控方面的变化处于物种形成的核心，可能在人从其祖先的进化历程中扮演了一个重要角色。
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16. In each case, the number of species observed today suggests that these traits have also led to rapid speciation, at a rate previously seen only in African cichlids .
在每一个例子里，今天所观察到的物种个数提示这些特性也已导致快速的物种形成，这种速率以前只在非洲丽鱼科鱼类中被观察到。
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17. For much of the 20th century, many evolutionists thought the answer was no. Instead they believed that genetic drift was the critical factor in speciation.
20世纪大部份的时候，许多演化学家认为这个问题的答案是否定的，他们认为遗传漂变才是推动物种形成的关键。
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18. Recent model-based estimates assume a single transition to a new ploidal level within a genus and provide a lower bound of the polyploidy speciation rate: 2 to 4% in flowering plants and 7% in ferns.
最近基于模型的估计假定在一个种属内是一个专一的过渡到新的倍性水平，并提供一个多倍体物种形成的下限比例：2%至4%的开花植物和7％的蕨类植物。
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19. There are two kinds of hybrid speciation: homoploid and polyploid .
杂合体物种形成有两种：同倍体和多倍体。
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20. The shallow depth of the lakes and channels and partial isolation of some areas probably encouraged these high speciation rates.
另外，湖泊、河道深度较浅，加上部份地区的相互隔离，或许也助长了物种形成的速度。
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21. The shallow depth of the lakes and channels and partial isolation of some areas probably encouraged these high speciation rates.
另外，湖泊、河道深度较浅，加上部份地区的相互隔离，或许也助长了物种形成的速度。
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22. In some fungi, there is evidence of incipient speciation.
在某些真菌中，有新发生的物种形成的证据。
-- 来源 -- 英汉 - 辞典例句
23. The origin of such large amounts of constitutive heterochromatin and their role in karyotype evolution and speciation remain a mystery.
如此大量的结构异染色质的来源及其在染色体组型进化和物种形成中的任务仍是一个谜。
-- 来源 -- 英汉 - 辞典例句
24. allochronic speciation
异时物种形成作用
-- 来源 -- 英汉 - 翻译参考[网络]
25. ecologic speciation
生态性物种形成
-- 来源 -- 英汉 - 翻译参考[网络]
26. (of biological species or speciation) occurring in areas isolated geographically from one another.
（生物学种或物种形成）在各区发生的。
-- 来源 -- 汉英 - 翻译参考
27. sympatric speciation
同域新种形成
-- 来源 -- 英汉 - 翻译参考[网络]
28. (of biological species or speciation) occurring in the same or overlapping geographical areas.
（生物学种或物种形成）发生在同样的或重叠的地理学区域。
-- 来源 -- 汉英 - 翻译参考
29. chemical speciation
化学形态分析
-- 来源 -- 英汉 - 翻译参考[网络]
30. nuclide speciation
核素种态
-- 来源 -- 英汉 - 翻译参考[网络]
31. explosive speciation
爆破式物种形成
-- 来源 -- 英汉 - 翻译参考[网络]
speciation
