What is homology?

Homology is the similarity of origin.
Homology is the similarity due to the inheritance of a common ancestor.
Homology refers to the similarity of parts or organs of different organisms due to a similar embryonic origin and evolutionary development from the corresponding part or organ in a remote ancestor.
Homologous organs are those that, coming from similar embryonic outlines, have a common basic structure and present a similar position in the body of the animal.
Homology is based on criteria such as similarity of basic structure, similarity of position and connections, similarity in development, frequency of existence in closely related forms, and the presence of other similarities in closely related forms.
Homology can be problematic due to the lack of knowledge of embryonic development.
Homology is different from analogy, which is similarity in appearance and function, but not of common origin.
Analogous organs are those that perform the same function but do not meet the criteria of homology.
Convergent evolution is the process that leads to similarity in the adoption of similar adaptive solutions.
Divergent evolution is the process of diversification, based on new ecological needs.
Both are consequences of the economy law: the same organ can perform different functions.