If you say you have an island inhabited by a species then something like an earth quak happens and the island splits apart and both parts cant see each other or any thing like that you have the species split onto seperate islands there would be different forms of food on them and they would have to adapt to them or maby different land variations like ones island will have bushes and one will have trees the animal could become a girraf as an example to reach the trees or a cow to reach the bushes.
Mutations would gradually accumulate even without natural selection. Natural selection determines which mutations persist in, and which fade from the population gene pool.
Typically through natural selection, strong, healthy animals that are good at camouflage accumulate. An albino squirrel will not pass on its genes because of the lack of protection.
Is called evolution.
Evolution
yes
Natural selection (the driving force of evolution) is the selection of genetic variations by how they effect the organism's chances of survival or reproduction. If they diminish it's chances, the organism or it's immediate offspring die and the gene is gone. If the genetic variations increase it's chances, then it survives. Without genetic variations there can be no evolution. Natural selection is the selection (by environmental pressures) of those variations.
Variations within a population. Variations mean traits that only certain individuals have that give the individual a greater or lesser chance of reproducing.
Go extinct.
The theory of evolution by natural selection.
yes
They help each other by gradually accumulate in a species, while unfavorable ones may disappear. Over a long time, natural selection can lead to changes.
Survival of the fittest
an increase by natural growth or addition
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There are three types of selections. The three types of selections include: disruptive selection, natural selection, and directional selection.
They depend on natural variation in traits due to mutation.
Variations within a population
natural selection
Variations are the basis of evolution, but variations within a population create diversity, which is useful to slow disease and allow natural selection to occur.
The theory of natural selection states that every organism displays slight variations from other organisms of its kind. It also states that the struggle for limited natural resources results in individuals with certain natural variations adapted to their specific environments.