Developmental biology is the study of the growth and development processes in various organisms, including animals, plants, and microorganisms. Its research encompasses processes such as embryonic development, cell differentiation, morphogenesis, organ formation, growth, aging, and death. The field involves multiple levels of study, including molecular, cellular, tissue, organ, and organismal levels. Developmental biology also covers areas such as regeneration, asexual reproduction, metamorphosis, and the growth and differentiation of stem cells in adult organisms.