Answer:
a process of change in a population through time
Explanation:
In evolution, the traits of a species change to benefit their survival. The changes occur between generations. Population is organisms of the same species.
Organisms do not become extinct by evolution. This is called extinction.
Reproductive isolation prevents reproducing between different species, or prevents the reproducing to continue.
Replacing one organism with another may occur with a lot of evolution, to the point where the original organism could not mate with the newest organism.
