A student reads about a particular experiment, gets inquisitive to learn more and hence tries to copy that particular experiment. This is called as replication as the student tries the same methodology and process adapted to perform the experiment. He tries to obtain the same result.
This result fascinates him giving assurance of the experiment. It also helps motivate trying different experiments. It also inspires him to make further researches.
In biology, evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection. The theory of evolution is based on the idea that all species? are related and gradually change over time.