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 serve similar functions in different species but do not share a common ancestor.

Front

Give an example of homologous structures.

Back

The arm bones of humans, birds, whales, and lizards.

Front

Give an example of analogous structures.

Back

Shark fins and dolphin fins.

Front

True or False: Analogous structures show common ancestry.

Back

False.

Front

True or False: Homologous structures indicate a common ancestor.

Back

True.

Front

What is the significance of homologous structures in evolution?

Back

They provide evidence for common ancestry and evolutionary relationships among species.

Front

What is the significance of analogous structures in evolution?

Back

They demonstrate how different species can evolve similar traits independently due to similar environmental pressures.

Front

What are vestigial structures?

Back

Structures that have lost most or all of their original function through evolution.

Front

How do homologous structures differ from analogous structures?

Back

Homologous structures arise from a common ancestor, while analogous structures arise independently.