Regeneration is that the tactic of renewal, restoration, and growth that produces genomes, cells, organisms, and ecosystems resilient to natural fluctuations or events that cause disturbance or damage. Each species is capable of regeneration, from microorganism to humans. Regeneration will either be complete wherever the new tissue is that the same because the lost tissue or incomplete wherever once the death tissue comes pathology. At its most basic level, regeneration is mediate by the molecular processes of sequence regulation. Regeneration in biology, however, chiefly refers to the morphogenic processes that characterize the phonotypical physical property of traits permitting multi-cellular organisms to repair and maintain the integrity of their physiological and morphological states. On top of the genetic level, regeneration is essentially regulated by agamas cellular processes. Regeneration is completely different from copy. For instance, hydra performs regeneration however reproduce by the tactic of budding.