You see a sign on a door that reads "Homologous Structures Inside." You go in and find
A)structures of animals that appear to have evolved from different parts of their bodies.
B)structures of animals that have difference appearances and functions but seem to have evolved from the same body part in a common ancestor.
C)structures of animals that have the same appearances and functions but obviously no common ancestor.
D)structures of animals that have different appearances and functions but different ancestors.

Question

Quizplus · Accepted Answer

The term "homologous structures" refers to structures in different species that have a similar origin in a common ancestor, but may have different appearances and functions due to adaptation to different environments. Therefore, option B is the best choice as it describes structures that have different appearances and functions but have evolved from the same body part in a common ancestor. Option A would be describing analogous structures, option C would be describing identical structures (not found in nature), and option D would be describing convergent evolution.

You See a Sign on a Door That Reads "Homologous