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Answered 2009-12-04 04:51:15

If a bat, a human, an alligator, and a penguin all evolved from a common ancestor, then they should share common anatomical traits. In fact, they do. Compare the forelimbs of the human, the bat, the penguin, and the alligator. Find the humerus, radius, ulna, and carpals in each forelimb. Though the limbs look strikingly different on the outside and though they vary in function, they are very similar in skeletal structure. More significantly, they are derived from the same structures in the embryo. Structures that are embryologically similar, but have different functions, are called homologous structures. Though these animals look different, a comparison of homologous structures indicates that they are quite similar. This suggests that these animals evolved from a common ancestor.








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Related Questions

What is homologous structures?

A homologous structures are structures that share an evolutionary ancestry. An example of homologous structures would be the bones in the arms of a human, the wings of a bat, and the legs of a dog.


Which pair of items describes homologous structures?

which pair of structures are homologous


What do homologous structures indicate about species relationships?

The presence of homologous structures (for example, the bone structure in chimpanzee arms, human arms, and whale flippers) indicates that the species sharing that homologous structure share a common ancestor.


Define homologous structures?

homologous structures is same structure,different function


What are the homologous body structures in birds and fish?

What are the homologous body structures in birds and fish?


How would you use homologous structures in a sentence?

I learned about homologous and heterozygous structures in Biology.


What term refers to similar structures that related species have inherited from common ancestor?

homologous structures (correct answer, your response)


Similar structures that evolved independantly are called?

Similar structures that have evolved independently are called homologous structures. An example would be the wings of a bird and the wings of an insect.


How are analogous and homologous structures different?

Homologous structures are two species that have similar structures that can be traced to a common ancestor, while an analogous one does not.


What are similar structures inheirited from an ancestor?

homologous structures


How are analogous structures and homologous structures different?

They are different because homologous structures have the same structure, but serve a different function. Like mammal arms(human, bat and whales). Analogous structues are different structures, but serve the same function. For example, bat wings and butterfly wings.


How do analogous structures and homologous structures differ?

When the structures are homologous, they have similar functions and have a common ancestry in evolution. When the structures are analogous, they have similar functions but have a different evolutionary origin.


Structures that are similar?

homologous


What do homologous structures indicate about of different species?

Homologous structures indicate that different species have a common evolutionary ancestor.


What it a homolgous structure?

Homologous structures - similar body structures that come from a common ancestor. Example: Human, cat, whale, and bat limbs.


What do homologous structures have in common?

Homologous chromosome have gene of same character.


Compare homologous and analogous structures?

Homologous structures are structures that indicate a related evolutionary ancestry, not just similarity. For example, the flipper of a whale, the wing of a bird, and the arm of a a human are similar in their bone structure. Analogous structures are structures that are similar in appearance and function but are not the result of shared ancestry. For example, the wings of a birds and insects have the same function, but they do not reflect a shared ancestry.


Name 3 different homologous structures?

Bird wings, horse legs, and flippers of a whale all that homologous structures.


What are some examples of homologous body structures?

One example would be the arms of a human and the forelegs of a horse.


Are homologous structures similar structures in related organisms?

yes


Homologous structures are evidence of what?

evolution


Do homologous structures have dissimilar constructions?

No


What is the difference between a homologous structure and a analogous structure?

Homologous structures derive from a common ancestor (eg. the forelimbs of birds and mammals are homologous structures). Analogous structures are the result of convergent evolution (eg. various features of the wings of birds and bats are analogous structures).


What are structures that develop from the same embryonic tissues but have different mature forms?

Homologous structures develop from the same embryonic tissues but have different mature forms.Homologous Structures


Analogous structures are ones that are shared by related species and that have been inherited from a common ancestor?

No. That describes homologous structures. The wings of a bird and the wings of a bat ( mammal ) are an example of analogous structures.