Replication is the process by which cells make copies of their DNA before cell division. This ensures that each new cell receives an identical set of genetic instructions. In organisms, replication is crucial for growth, repair, and reproduction. In scientific research, replication refers to the ability to repeat an experiment and obtain the same results. This is important for validating findings and ensuring that they are reliable. When studies are replicated successfully, it strengthens the credibility of the original research and contributes to the body of knowledge in fields like biology and psychology.