MARK TAKAHASHI: I'm Edmunds editor Mark Takahashi. And here's an Expert Rundown of the 2017 Ford Escape. The Ford Escape is a middle of the road choice among compact crossover SUVs. It does everything well without any particular high or low points.
Homologous Structures. A homologous structure is an organ, system, or body part that shares a common ancestry in multiple organisms. This definition is found in evolutionary biology, and uses the meaning of having a similar structure or origin.omologous Structures. A homologous structure is an organ, system, or body part that shares a common ancestry in multiple organisms. This definition is found in evolutionary biology, and uses the meaning of having a similar structure or origin.
While homologous structures show how similar species have changed from their ancient ancestors, analogous structures show how different species have evolved to become more similar. Speciation is the change over time of one species into a new species.nalogous structures do not have to have the same evolutionary path. One analogous structure may have come into existence long ago, while the analogous match on another species may be relatively new.