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Vestigial structures do not harm the organism. Nature selects against only harmful traits.
It tells you when the animal that made a fossil was alive.
Radio carbon dating proves scientifically the age of a given material. If a fossil is found embedded in material that is x number of years old and a similar fossil is found x number of years older or younger then we can surmise the evolution of that species. There are thousands of examples of theoretical evolution using this method.
fossil
It allows divergence to occur
It allows populations to become genetically different.
They are thought to have separate paths of evolutionary development.
They developed along different evolutionary paths.
They had independent evolutionary development.
When there is low gene flow
When there is no selective pressure
When there is a bottleneck
Humans are more closely related to chimpanzees than garden snails.
