Difference Between Homologous and Analogous

A wing of a bat can be the most appropriate and classic example of a homologous structure. This is so because both of them have a similar structure of the bone, and being a mammal, the evolutionary structure of a bat is vividly similar.

Analogous structures on the other hand are the ones that have features of totally different species but possess the same function.

Comparison Table Between Homologous and Analogous

Parameters of ComparisonHomologousAnalogous
DefinitionHomologous are the ones that have a similar appearance in structure but the functions of those are different.Analogous are the ones that have different-looking structures but the functions are the same.
FunctionsHomologous have dissimilar functions.Analogous have similar functions.
InheritanceThese structures are inherited from common ancestors.The structures of analogous animals are not inherited from their ancestors.
SpeciesThe homologous feature is developed in related species only.Features are developed in the unrelated species
DevelopmentHomologous features are the development results of adapting to a different environment.Analogous features are the development results of adapting to a similar environment.

What is Homologous?

Talking generally, in general science homologous means something to show similarity between the two. Now the similarity can be in structure, function, feature, or characteristics.

In general science, it is a concept of anatomy in the biology stream, which refers to the animals having the features of similar functions but the condition here is that they are identified as homologous ones only if they have a similar origin since their evolution.

What is Analogous?

The term analogous was derived from the Greek language from the word ‘analogous which exactly means- is according to the exact ratio or proportion.

This can be explained with few examples. Humans' brains and computers, both work the same way but are designed to be different and the structure varies from each other a lot.

Main Differences Between Homologous and Analogous

  1. Not just this, the development of both the structures are different too, Homologous feature is developed in related species only while analogous features are developed in the unrelated species
  2. The environment in which these features are developed among the species is varies to, Homologous features are the development results of adapting to a different environment while the Analogous features are the development results of adapting to a similar environment.

Conclusion

It concludes now that homologous and analogous are two different parts of anatomy which is itself a stream of biology. These are different studies that specify various similarities and differences between many animals and other creatures.

References

  1. https://academic.oup.com/sysbio/article-abstract/19/2/99/1655771
  2. https://www.annualreviews.org/doi/abs/10.1146/annurev.biochem.77.061306.125255
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