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Variation is necessary for species to adapt and evolve new mechanisms or helpful alterations. Lets say a plague is killing an animal species - out of hundreds of millions of random genetic mutations (variations) in that generation (assuming there are at least a million or so of that species) some of those might make some of the species more resistent or even immune to that disease. Those animals' offspring will survive longer and reproduce more, and eventually their offspring will outnumber the non-resistent non-immune population, in effect replacing a weaker species with a slightly stronger, more sophisticated one.
That is natural selection, and it doesn't work without random genetic variations for environmental pressures to "select".
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∙ 12y ago
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Is Natural selection a source of genetic variation in a population?
No, natural selection works on that genetic variation presented to it.
Can natural selection occur without variation in a population?
no there is no genetic variation for natural selection to act upon
How does natural selection enhance or reduce the variability of a species?
Natural selection doesn't reduce variation. Variation is regulated by the rate of mutation.Natural selection reduces the chance of bad variation from being passed on and increases the chances for good variation to be passed on.
What affects natural selection?
variation,overproduction, and competition
Is natural selection a source of variation within species?
No, mutation and sexual recombination are the sources of variation and natural selection selects from those variations presented to it against the immediate environment.
How does genetic variation support Natural Selection?
Genetic variation in itself does not 'support' natural selection: it is what natural selection acts upon.
Is Natural selection a source of genetic variation in a population?
No, natural selection works on that genetic variation presented to it.
What principles includes variation and competition?
Natural selection.
Can natural selection occur without variation in a population?
no there is no genetic variation for natural selection to act upon
What characteristic within populations cause natural selection to occur?
Genetic variation. If there were no variation in the genes/phenotype then natural selection would have nothing to select from.
Cows that give more milk than other cows are an example of?
Natural variation, natural selection, artificial selection, genetic engineering, etc.
How does natural selection enhance or reduce the variability of a species?
Natural selection doesn't reduce variation. Variation is regulated by the rate of mutation.Natural selection reduces the chance of bad variation from being passed on and increases the chances for good variation to be passed on.
Is it possible for a population to undergo natural selection?
No, there is no genetic variation upon which natural selection can operate.
Is natural selection a process or a result of a process?
Natural selection is only the result of changing environments, mutation and the variation resulting therein. Natural selection is the process of adaptive change and the main mechanism of evolution that leads to speciation. Natural selection is a process as mutation and variation are grist to the mill of natural selection.
Why would natural selection not occur in this poplutation?
What population? Perhaps you mean if there were no variation for natural selection to select from.
Differences between organisms of the same species are known as?
Homologous structures. ps go to who's the cutest.com and click on the pie button
Which type of selection tends to increase genetic variation?
Natural Selection.
