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.
Many species have similar traits because they are descendants of a single common ancestor. These species developed from a single source and are related to a certain degree despite their current differences. The traits they share are known as homologous structures. Homologous structures are similar in structure and function because they originated from the same ancestor long ago. Species may also have similar traits even though they are not related to each other. This usually results because the species live in similar environments and fill similar ecological roles. The structures in this case are known as analogous structures.