Science

Difference between homologous structure and analogous structure

Main difference

The evolution of organisms is an ancient concept, since one of Charles Darwin’s beliefs also says that human beings have evolved from monkeys. That theory is based on the similarity of different traits and functions between two different individuals. When it comes to the similarity of different body structures of the organism, then it gives rise to the concept of homologous structure and analogous structure. The similarity of the body structure of different organisms on the basis of their common ancestry is called homologous structures, while the similarity of the body structure of different organisms belonging to different groups is called analogous structure.

Comparative chart

Homologous structure Analogous structure
Definition The homologous structures of a different organism are similar to each other in their anatomy, morphology, embryology, and genetics, although these structures perform different functions. Analogous structures are different in anatomy and morphology although they perform similar functions.
Ancestry Structures of organisms that belong to similar ancestors. Structures of organisms belonging to different ancestors and groups.
Development and Origin These structures have a similar development and origin. These structures have different development and origin.
Example For example, the forelimbs of different organisms such as the whale, cat, horse, monkey, and man resemble each other in their anatomies. For example, the bat wing and the honey bee wing have a different origin and are quite different from each other in terms of the anatomy of the structures. However, both structures perform a fairly similar function.

What is homologous structure?

The homologous structures of a different organism are similar to each other with respect to their anatomy, morphology, embryology, and genetics, as they belong to the similar ancestor. Although these structures are very similar and come from similar ancestors, both structures perform different functions that can be easily distinguished. For example, the forelimbs of different organisms such as the whale, cat, horse, monkey, and man are similar with respect to their anatomy. However, they are quite different when it comes to the functions these forelimbs perform in different organisms. Based on the belief that animals that have homologous structures have a common parent or belong to the same lineage, even with many similarities, these structures perform different functions. Taking a closer look at the homologous structures, the human arm, bird wings, seal fins, and horse forelegs all have quite similar anatomy. On the other hand, these animals use these structures for different purposes, as humans use their hand to hold and grasp, the bird uses wings to fly, and seals use flippers to swim. In addition to belonging to a similar lineage or ancestry, the development of these homologous structures can also be seen in related animals. Since humans use the hand to hold and grasp, the bird uses wings to fly, and seals use flippers to swim. In addition to belonging to a similar lineage or ancestry, the development of these homologous structures can also be seen in related animals. Since humans use the hand to hold and grasp, the bird uses wings to fly, and seals use flippers to swim. In addition to belonging to a similar lineage or ancestry, the development of these homologous structures can also be seen in related animals.

What is analogous structure?

Analogous structures of organisms are different in anatomy, morphology, and the organism that has these structures belongs to different groups or belongs to different ancestors. However, even with many of the differences, these structures perform a similar type of function. Even these analogous structures are different with respect to that particular body structure and its origin, and the pattern of development is also different. For example, the bat wing and the honey bee wing have a different origin and are quite different from each other in terms of the anatomy of the structures. However, both structures perform a fairly similar function as both are used for the purpose of flying. This similarity in structure is not due to the evolution of organisms,

Homologous structure vs. analogous structure

  • The homologous structures of a different organism are similar to each other in their anatomy, morphology, embryology, and genetics, although these structures perform different functions. On the other hand, analogous structures are different in terms of anatomy and morphology, although they perform similar functions.
  • The similarity of the body structure of different organisms on the basis of their common ancestry is called homologous structures, while the similarity of the body structure of different organisms belonging to different groups is called analogous structure.
  • In homologous structures, the origin and development of structures are quite similar, while in analogous structures the origin and development of structures are

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