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Some have thought so because natural selection was seen to reduce variation by culling unsuccessful phenotypes so that alleles did not change over time in populations. This is no longer thought as much as the rates of mutation are better understood and known to outpace natural selection and that adaptive change can accommodate more than one successful phenotype so that many allels can be fixed in populations gene pools.
What else can I help you with?
Why does evolution evolution by natural selection can not occur if the variation in a characteristic does not contribute to differences in fitness?
Differential selection is just that, differential. Some variation is marginally superior to another variation us fitness difference, so the key is to have variation. Then natural selection will " see " this slight variation and select the better adapted trait against the background of the immediate environment.
What does the unit of evolution depend on?
The unit of evolution depends on the level at which genetic variation is passed on to the next generation. This can occur at the level of individuals, populations, or species. The unit of selection is the entity on which natural selection acts to drive evolutionary change.
Which of the following is necessary for evolution to occur?
Genetic variation is necessary for evolution to occur, as it provides the raw material for natural selection to act upon. This variation can arise from mutations, genetic recombination, or gene flow.
What allows natural selection and evolution to occur?
Natural selection and evolution occur when individuals within a population vary in traits that affect their survival and reproduction. Traits that increase an individual's likelihood of survival and reproduction are passed on to the next generation, leading to the accumulation of beneficial traits in the population over time. This process drives the adaptation of populations to their environments.
Evolution can occur at different rates however for evolution to occur there must be?
variation in the traits of organisms, heredity (the ability to pass on those traits to offspring), and differential survival and reproduction based on those traits (natural selection). These elements work together to drive the process of evolution over time.
What are the 4 mechanisms by which evolution can occur?
genetic drift, mutation, natural selection, and migration
Why does evolution evolution by natural selection can not occur if the variation in a characteristic does not contribute to differences in fitness?
Differential selection is just that, differential. Some variation is marginally superior to another variation us fitness difference, so the key is to have variation. Then natural selection will " see " this slight variation and select the better adapted trait against the background of the immediate environment.
What are three reasons for natural selection to occur?
1. different breeding 2. evolution 3.adaptation
How does natural selection provide a mechanism for evolution to occur?
by having sexual intercourse with hoes and getting money
Why is Lamark not called the father of Evolution?
Because it was Darwin who made it a scientifically plausible explanation, by providing a mechanism by which evolution could occur....Natural Selection.
What does the unit of evolution depend on?
The unit of evolution depends on the level at which genetic variation is passed on to the next generation. This can occur at the level of individuals, populations, or species. The unit of selection is the entity on which natural selection acts to drive evolutionary change.
6 Explain why evolution by natural selection can not occur if the variation in a characteristic does not contribute to differences in fitness?
If there is not reproductive fitness conveyed by a variant trait, then natural selection has nothing to select and nothing to promote into the populational gene pool.
In the book The Origin of Species does evolution occur by means of natural selection?
Yes, that is what Darwin thought. However this has never been shown to be true.
Which of the following is necessary for evolution to occur?
Genetic variation is necessary for evolution to occur, as it provides the raw material for natural selection to act upon. This variation can arise from mutations, genetic recombination, or gene flow.
In order for evolution by natural selection to occur what has to happen?
There must be genetic variation, the variation must be heritable, and there must be differential reproduction (due to competition).
Which is the single most important type of mutation that eventually allows for evolution via natural selection to occur?
gene duplication (might give advantages)
What allows natural selection and evolution to occur?
Natural selection and evolution occur when individuals within a population vary in traits that affect their survival and reproduction. Traits that increase an individual's likelihood of survival and reproduction are passed on to the next generation, leading to the accumulation of beneficial traits in the population over time. This process drives the adaptation of populations to their environments.
