What periods of postembryonic development are secreted in animals?

In animals, there are three main periods of postembryonic development – juvenile (until puberty), a period of maturity and a period of old age ending in death.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.