Answer:
Species
Explanation:
According to the neo-darwinian theory, evolution is described as a genetic change in a population over time. It refers to changes that occur in the traits of a population over many generations and not the changes that occur in an organism during its lifetime. Mutation being an agent of evolution increases the chances of having adaptive variations in a population. The adaptive variations confer selective advantage to organisms possessing them. The organisms are able to survive to maturity and pass on their characteristics to their offspring leading to creation of new species with desired traits to survive best in the environment.
