Have you ever thought about how various kinds of pets have body components that occupational in comparable ways? favor bats and bees? Both creatures have actually wings - even though your bodies room structured really differently.

You are watching: A bat wing an alligator leg and a human arm are homologous structures

The an essential to understanding these differences lies in discovering what homologous and analogous frameworks are. In this article, we"ll talk about each kind of structure and also discuss the similarities and also differences in between them.

What space Homologous Structures?

Homologous structures are similar structures in related organisms. The most vital thing to remember about homologous frameworks is that they share common ancestry. In other words, just organisms that space somehow concerned each other can have homologous structures.

For example, a chimpanzee’s arm and a human’s arm are homologous structures. Both sets of arms have actually a similar structure and use and chimpanzees and humans re-superstructure a typical ancestor.

What space Analogous Structures?

Analogous frameworks are comparable structures in unrelated organisms. These frameworks are comparable because they do the exact same job, not due to the fact that they share typical ancestry.

For example, dolphins and sharks both have fins, even though they aren’t related. Both species developed fins due to the fact that of how (and where) lock live.


What’s the Difference in between Homologous and Analogous Structures?

Homologous and analogous structures have several an essential differences. Let’s take a look at them:

Homologous StructuresAnalogous Structures

Shared ancestry

Similar inner structure

May look different externally

No mutual ancestry

Similar function

May look comparable externally

Homologous structures Example

A an excellent example the homologous structures space the wing of a bat and also the eight of a human. Bats and humans room both mammals, for this reason they re-superstructure a usual ancestry.

Both a bat’s wing and also a human’s eight share a comparable internal bone structure, even though castle look very different externally. The wing and the arm also perform different functions - wings help bats fly, while arms assist humans connect with their world in a an extremely different way.


Analogous structures Example

A great example the analogous structures room a bat’s wing and also a bee’s wing. Bats and bees carry out not share typical ancestry, therefore the frameworks cannot it is in homologous.

Both bat wings and bee wings serve a common purpose - help bats and also bees fly! The structures look similar on the outside, too. However, their internal structures are an extremely different - bat wings have a bony framework with muscles, while bee wings are membranous extensions.

Homologous and also Analogous structures - an essential Takeaways

Many pets have body parts that look at similar, even though they don’t share typical functionality. Other animals have body components that look totally different, but have a mutual background. Here’s the difference between homologous and also analogous structures:

Homologous structures are structures that may look or role differently from related organisms.Analogous structures are structures the look and function similarly native unrelated organisms.

What’s Next?

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