Natural selection likely favored individuals of Eohippus that were better adapted to their environment, such as those with longer limbs for faster running to evade predators or with teeth suited for browsing on tough vegetation. Over time, these advantageous traits became more common in the population while less beneficial traits were minimized, leading to the evolution of the species.
Genetic change is necessary for natural selection to take place
If a population exists in an environment that changes very little, then natural selection may not provide any pressure to change. However, even under these conditions genetic driftoccurs, introducing random change within the parameters set by natural selection.
no
Evolution, of course. Evolution can happen without natural selection in some cases; drift, flow. Generally though, natural selection causes evolution and then, by definition, would come first.
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Only natural selection could be the answer here as natural selection is the main driver of adaptive change leading to evolutionary change and speciation in large populations.
Genetic change is necessary for natural selection to take place
Natural selection, Evolution, Artificial selection, disasters
Natural selection usually causes a species to change gradually
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.
If a population exists in an environment that changes very little, then natural selection may not provide any pressure to change. However, even under these conditions genetic driftoccurs, introducing random change within the parameters set by natural selection.
Yes. Without natural selection there might probably still be change, but it would produce a fine gradient of diverging morphologies in every 'direction' of change. Natural selection limits the 'directions' of change, thereby producing distinct morphologies and thus distinct species.
Natural selection
no
Discovered Natural Selection
character change
character change