Question

what is the primary reason anatomical structures in different species are considered homologous? 1. they always look the same across species. 2. they have a common evolutionary origin. 3. they serve identical purposes in every species. 4. they develop in the same environment.

Explanation:

Homologous anatomical structures in different species have a common evolutionary origin. They may not look the same or serve the same purpose in every species and do not necessarily develop in the same environment.

Answer:

They have a common evolutionary origin.