Natural selection acts on variation by picking out from a population's gene pool those that are more fit to survive. More variation leads to more natural selection. For example, currently endangered cheetas are found out to have less genetic variation than other animals. As a result, if a disatrouous event occured, there are no genes that could help the cheetas survived. Thus, natural selection prevent the cheetas from reproducing as a population and they become extinct.
Genetic variation in itself does not 'support' natural selection: it is what natural selection acts upon.
Genetic variation. If there were no variation in the genes/phenotype then natural selection would have nothing to select from.
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.
What population? Perhaps you mean if there were no variation for natural selection to select from.
Without variation natural selection would have nothing to select from that would confer survivability and reproductive success. on the organisms being selected against the organisms conspecifics and the immediate environment. Mutation and sexual recombination provide the main sources of this variation that is needed to make selection work. Mutation is the variation presented that causes the real adaptive change that can lead to speciation.
Genetic variation in itself does not 'support' natural selection: it is what natural selection acts upon.
No, natural selection works on that genetic variation presented to it.
Natural selection.
no there is no genetic variation for natural selection to act upon
Genetic variation. If there were no variation in the genes/phenotype then natural selection would have nothing to select from.
Natural variation, natural selection, artificial selection, genetic engineering, etc.
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.
No, there is no genetic variation upon which natural selection can operate.
The ultimate source of variation is mutation. However, recombination, or crossing over, can produce enormous amounts of variation by shuffling alleles into different combinations. Combined, the two processes produce the variation upon which natural selection can act, and which results in evolution.
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.
Disruptive selection
What population? Perhaps you mean if there were no variation for natural selection to select from.