Evolution is the continuous and heritable change over successive generations. Evolution leads to change in certain traits of an organism, which is then inherited by the offspring.
The data required to determine whether evolution occurred in the groups is that the two new populations must be formed from an original population, have evolved, and the inability of the two new breeds formed to reproduce.
Speciation can be caused due to evolution, in which the accumulation of small alterations in the genetic sequences over a long period of time.
For example, the speciation occurred when 200 years ago, apple maggot laid off the eggs on hawthorns.
Now, in the recent trend, the hawthorns mate with hawthorns, and maggots mate with the maggots only. It represents the evolution of species unable to interbreed and originated from a common source.
Thus, data required to determine evolution is a mutation, changes, original population, and reproduction.
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