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Natural processes such as speciation and gradualism provide the genetic basis for what?
Wiki User
∙ 15y ago
evolution
Wiki User
∙ 15y ago
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What kind of selection can result in speciation?
Natural selection seems to be the only selection that can drive speciation with powerful adaptive change. Sexual selection seems to stay within the species and both gene flow and genetic drift do not seem to drive speciation very well.
Does convergent evolution result in speciation?
All evolution that results in increasing genetic divergence between subpopulations may result in speciation. That includes convergent evolution: convergence occurs at the phenotypical level, not at the genetic level.
Slow change over time in a species is a way to define?
It is called speciation. Speciation can happen through adaptation, which is a change in an organisms genetic code. If adaptation has gone on long enough so that the two organisms can no longer produce offspring, then speciation has occurred.
How does genetic variation support Natural Selection?
Genetic variation in itself does not 'support' natural selection: it is what natural selection acts upon.
How is genetic diversity important to the concept of natural selection?
Without genetic diversity, natural selection cannot occur
Why is natural variation important when it comes to evolution?
Only in the sense that natural selection needs variations in organisms to select from. Evolution could take place by random processes, such as genetic drift, or geographic processes, such as gene flow, but only natural selection causes the adaptive change that results in speciation.
What are three ways that can lead to speciation?
by natural selection, genetic drift and geographical isolation
How do change Genetic equilibrium lead to speciation?
Allele frequency is altered by genetic drift, natural selection, migration, mutation, or nonrandom mating. This results in a change in genetic equilibrium in a population that is evolving. Evolution leads eventually to speciation.
What prevents speciation from occurring in sympatric populations?
Gene flow between populations can hinder the development of genetic differences necessary for speciation. Additionally, strong environmental pressures favoring specific traits in a population can limit genetic variation and prevent the emergence of distinct species. Lastly, hybridization between different groups can also counteract speciation in sympatric populations.
What kind of selection can result in speciation?
Natural selection seems to be the only selection that can drive speciation with powerful adaptive change. Sexual selection seems to stay within the species and both gene flow and genetic drift do not seem to drive speciation very well.
Speciation is founded on the principle of genetic mutations and?
speculated genetic possibilities .
What are the four processes that lead to evolution?
Mutation, Natural Selection, Migration, and Genetic Drift.
What are gradualism and uniformitarianism's effects on Darwin?
Darwin's mechanism for evolution was natural selection through gradual change in the genome in response to factors pressuring from the environment. Geological gradualism, the thought that large changes are an accumulation of smaller changes over time and uniformitarianism, the idea that geologic processes have remained constant over many many years, gave Darwin a geologic time frame in which his mechanism of natural selection could operate. The small genetic variations and mutations that accumulated in an organism to shape the drastic changes leading to the differentiation of new species needed constant environmental pressures over a long period of time. Gradualism and uniformitarianism allowed for both of these criteria and so influenced Darwin's theory of evolution by means of natural selection.
How did geological gradualism and uniformitarianism influence Darwin?
Darwin's mechanism for evolution was natural selection through gradual change in the genome in response to factors pressuring from the environment. Geological gradualism, the thought that large changes are an accumulation of smaller changes over time and uniformitarianism, the idea that geologic processes have remained constant over many many years, gave Darwin a geologic time frame in which his mechanism of natural selection could operate. The small genetic variations and mutations that accumulated in an organism to shape the drastic changes leading to the differentiation of new species needed constant environmental pressures over a long period of time. Gradualism and uniformitarianism allowed for both of these criteria and so influenced Darwin's theory of evolution by means of natural selection.
What process often begins by a portion of a population becoming physically or geographically isolated speciation or selective breeding or genetic change or resistiance?
Speciation
Fenomenos o procesos basicos de la poblacion?
The population is subject to four main evolutionary processes: genetic drift, mutation, gene flow, and natural selection. It also takes into account the factors of recombination, population subdivision and population structure. Studies in this branch of biology examine such phenomena as adaptation and speciation.
Speciation without geographic isolation is called what?
Sympatric Speciation develops within the range of the parent population. This type of speciation does not include geographical isolation, and can occur rapidly if a genetic change results in a barrier between the mutants and the parent population.
