Homologous and analogous

Front

What is a homologous structure?

Back

A homologous structure is an anatomical feature in different species that is similar in structure but may serve different functions, indicating a common evolutionary origin.

Front

Give an example of homologous structures.

Back

Human arm and bird wing are examples of homologous structures.

Front

What is an analogous structure?

Back

An analogous structure is an anatomical feature in different species that serves similar functions but is not derived from a common ancestor.

Front

Give an example of analogous structures.

Back

Bird wings and butterfly wings are examples of analogous structures.

Front

What type of structure is a human arm?

Back

Homologous structure.

Front

What type of structure is a bird wing?

Back

Homologous structure.

Front

What type of structure is a butterfly wing?

Back

Analogous structure.

Front

What is the significance of homologous structures in evolution?

Back

Homologous structures provide evidence for common ancestry and evolutionary relationships among species.

Front

What is the significance of analogous structures in evolution?

Back

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

Front

What is a vestigial structure?

Back

A vestigial structure is an anatomical feature that has lost most or all of its original function through the course of evolution.