**Exogenosis is** the synthesis of exogenous components, as a result of which new forms of matter are formed. Exogenous chemical, biological, physical factors act as donors of functional groups or energy in the processes of exosynthesis. In turn, exosynthesis mechanisms always include corresponding components that are absent in the feedstock.
**Exogenous** is a type of gene that appears through gene fusion. If you remember the fairy tale, the hare from “The Fox and the Hare,” remembering the fox’s fangs, decided to prepare for a fight with her by wrapping tree branches around himself and strengthening weak points with his claws.