How to use saltations in a sentence? Find typical usage patterns (collocations)/phrases/context for "saltations" and check conjugation/comparative form for "saltations". Mastering all the usages of "saltations" from sentence examples published by news publications.
The gradual accumulation of minute variations did not fit with the facts of heredity. For Punnett, none of these observations were explained by gradual selectionism. Instead he thought mimicry had arisen from sudden mutational jumps (saltations). Once a mimic was formed by mutation, natural selection might play a conservative role.
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Using uniformitarianism, which states that one cannot make an appeal to any force or phenomenon which cannot presently be observed (see catastrophism), Darwin theorized that the evolutionary process must occur gradually, not in saltations, since saltations are not presently observed, and extreme deviations from the usual phenotypic variation would be more likely to be selected against. Gradualism is often confused with the concept of phyletic gradualism. It is a term coined by Stephen Jay Gould and Niles Eldredge to contrast with their model of punctuated equilibrium, which is gradualist itself, but argues that most evolution is marked by long periods of evolutionary stability (called stasis), which is punctuated by rare instances of branching evolution.Eldredge, Niles, and S. J. Gould (1972).
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Instead he thought mimicry had arisen from sudden mutational jumps (saltations). Once a mimic was formed by mutation, natural selection might play a conservative role. However, one by one, each of these objections were shown to be without substance. Evidence from field observations and experiments showed that birds were often the agents of selection in insects.Carpenter, G. D. H. and Ford, E. B. 1933. Mimicry.
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University Of Chicago Press. p. 368 In their paper on evolutionary theories in the 20th century (Levit et al. 2008) wrote: > The advocates of saltationism deny the Darwinian idea of slowly and > gradually growing divergence of character as the only source of evolutionary > progress. They would not necessarily completely deny gradual variation, but > claim that cardinally new ‘body plans’ come into being as a result of > saltations (sudden, discontinuous and crucial changes, for example, the > series of macromutations).
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Biology Direct 4: 46. In recent years there are some prominent proponents of saltation, including Carl Woese. Woese, and colleagues, suggested that the absence of RNA signature continuum between domains of bacteria, archaea, and eukarya constitutes a primary indication that the three primary organismal lineages materialized via one or more major evolutionary saltations from some universal ancestral state involving dramatic change in cellular organization that was significant early in the evolution of life, but in complex organisms gave way to the generally accepted Darwinian mechanisms.Roberts, E., A. Sethi, J. Montoya, C.R. Woese and Z. Luthey-Schulten. (2008).
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He then introduced the 'swamping argument' to deny the possibility that an occasional monstrous individual, a saltation, could supply an escape from this state of affairs and give rise to a permanent adaptation. Jenkin made a mathematical calculation for his argument Jenkin made a mistake in his calculation stating the chances are “fifty to one” where it should have been “ten thousand to one”. He continued his essay with a melodramatic story to elaborate on his calculation Darwin agreed that a variation originating in a single individual would not spread across a population, and would invariably be lost. Darwin stated to his colleagues that he was always aware that “swamping” would stamp out saltations.
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