Homologous vs Analogous Traits

Front

What are homologous structures?

Back

Structures that are inherited from a common ancestor, showing similar anatomy but may have different functions.

Front

What are analogous structures?

Back

Structures that have similar functions but do not share a common ancestor; they evolved independently.

Front

Give an example of homologous structures.

Back

The forelimbs of mammals, such as the human arm, whale flipper, and bat wing.

Front

Give an example of analogous structures.

Back

The wings of birds and the wings of insects, like butterflies.

Front

True or False: Homologous structures indicate common ancestry.

Back

True

Front

True or False: Analogous structures show common ancestry.

Back

False

Front

What is the main difference between homologous and analogous structures?

Back

Homologous structures arise from a common ancestor, while analogous structures arise from convergent evolution.

Front

What are vestigial structures?

Back

Structures that have lost most or all of their original function through evolution, like the human appendix.

Front

How do homologous structures support the theory of evolution?

Back

They provide evidence of common ancestry and evolutionary divergence.

Front

What is convergent evolution?

Back

The process where unrelated organisms develop similar traits due to similar environmental pressures.