Analogous, Homologous, and Vestigial Structures

Front

What are homologous structures?

Back

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

Front

What are analogous structures?

Back

Body parts from different organisms that perform similar functions but do not share a common ancestor.

Front

What are vestigial structures?

Back

Body parts that have lost their original function through evolution, such as the human appendix.

Front

Give an example of a homologous structure.

Back

The forelimbs of humans, whales, and bats are homologous structures.

Front

Give an example of an analogous structure.

Back

The wings of insects and birds are analogous structures.

Front

What type of evidence for evolution includes homologous and vestigial structures?

Back

Comparing body structures (anatomy) provides evidence for evolution.

Front

True or False: Analogous structures come from a common ancestor.

Back

False, analogous structures do not come from a common ancestor.

Front

True or False: Vestigial structures are fully functional in modern organisms.

Back

False, vestigial structures have lost their original function.

Front

What is the significance of homologous structures in evolution?

Back

They indicate 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 due to similar environmental pressures.