| 词汇 | natural-selection |
| 释义 | natural selection noun[ U ] uk /ˌnætʃ.ər.əl sɪˈlek.ʃən/ us /ˌnætʃ.ɚ.əl sɪˈlek.ʃən/ the process that results in the continued existence of only the types of animals and plants that are best able to produce young or new plants in the conditions in which they live（物种的）自然选择，物竞天择 Compare survival of the fittest Animal reproduction androgen anti-oestrogen asexuality asexually barrenness calve fertile gamete impregnate out-reproduce ovulate ovulation panmictic panmixia procreate procreation procreative rut spawn sterile natural selection | American Dictionarynatural selection noun[ U ] us/ˈnætʃ·ər·əl siˈlek·ʃən/ biology the theory that organisms with characteristics that allow them to live successfully in a particular environment will reproduce organisms with the same characteristics Examples of natural selectionnatural selection The academic struggle often seems to resemble naturalselection, where the fiercest competition is between conspecifics, rather than between different species. Is there any alternative to such a reward/ punishment - based system in this evolution by naturalselection situation? If cultural innovations modify naturalselection pressures, then genetic change resulting from modified naturalselection is likely to follow. Chapter 4 also contains a good deal of discussion of the role of naturalselection in evolution. Putting natural information to one side, what is mentally represented is only what naturalselection has found it was useful to have represented. Therefore, naturalselection should tend to eliminate it. And it's not by chance; it's by naturalselection. The concept of adaptive effect focuses attention on how the history of naturalselection affected a current trait. For some reason we have conceived of naturalselection as a single force and evolution as a single historical strand. Adaptation is a good concept because all adaptations are explained through naturalselection. While naturalselection acts on phenotypes, these phenotypes reflect the underlying physiology. Naturalselection also would have favored anorexia during times of food-related travel. That is, naturalselection will cause plots of to curve upwards over time. If genome rearrangements are common and subject to naturalselection, this can leave important signatures on patterns of nucleotide variation. The evolution of recombination removing the limits to naturalselection. See all examples of natural selection These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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