| 词汇 | example_english_ancestral-species |
| 释义 | ancestral speciescollocation in Englishmeanings of ancestraland speciesThese words are often used together. Click on the links below to explore the meanings. Or, see other collocations with species. ancestral adjective[before noun] uk /ænˈses.trəl/ us /ænˈses.trəl/ relating to members of your family from ... See more at ancestral species noun[C] uk /ˈspiː.ʃiːz/ us /ˈspiː.ʃiːz/ a set of animals or plants in which the members have similar characteristics to each other and can breed with ... See more at species Examples of ancestral speciesThese 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. A pair of homologous genes sampled from two species must have diverged in the ancestralspecies. An attempt to estimate the effective size of the ancestralspecies common to two extant species from which homologous genes are sequenced. As incipient species begin to diverge from one another, they originally share genetic variation that was common to their ancestralspecies. Two proteins in different species descended from the same protein in an ancestralspecies are orthologues. The authors estimated the population sizes of ancestralspecies of humans, chimpanzees and gorillas, using synonymous, pseudogene and intron differences (referred to as ' silent ' differences) at many nuclear loci. Since we do not know what the ancestralspecies at these nodes were like, values at nodes are averages of the species (or nodes) that evolved from them. Sequences from different loci share the same species divergence time, while their coalescent times in the ancestral population vary according to the population size of the ancestralspecies. For example, a fossil record may make it possible to determine the number of years between an ancestralspecies and a descendant species. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Rudimentary body parts, those that are smaller and simpler in structure than corresponding parts in the ancestralspecies, are called vestigial organs. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It is thought that the ancestralspecies inhabited a part of the volcanic archipelago that is now submerged. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. However, it is actually a form of regressive atavism, meaning that he has inherited traits of ancestralspecies of the human race such as reptiles. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The ancestralspecies was likely smaller than the current one, as the earliest red fox fossils are smaller than modern populations. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. There is no clear line demarcating the ancestralspecies from the descendant species. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It is theorized that they were an ancestralspecies from which these two modern species diverged. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. One hypothesis states that echolocation evolved from an ancestralspecies of swiftlets and was lost in the genera which lack echolocation. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Indirect evidence suggests that ancestralspecies undertook two periods of aggressive range expansions (dispersal) separated by a period of inactivity. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Superfamily members may be in different species, with the ancestral protein being the form of the protein that existed in the ancestralspecies (orthology). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. At very early stages, for instance, all vertebrates appear extremely similar, but do not exactly resemble any ancestralspecies. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It was estimated that the common ancestralspecies that first developed venom in the venom clade lived on the order of 200 million years ago. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. 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. Want to learn more? Go to the definition of ancestral Go to the definition of species See other collocations with species |
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