Post-Embryonic Life: Organisms in Their Environment

After birth and even as adults, animals continue to develop. For example, when animals experience damage, they can regenerate individual tissues and sometimes entire body parts. Another cue that can influence post-embryonic development is nutrition. Nutrition can control puberty, cell and organismal growth, and even cell fate. The metabolism and behavior of animals is coordinated with the light/dark cycles of the day and depends on an internal clock termed the circadian clock.