Homologous and Analogous Structures

Front

What are homologous structures?

Back

Structures in different species that share a common ancestry, even if they have different functions.

Front

What are analogous structures?

Back

Structures in different species that serve similar functions but do not share a common ancestry.

Front

Give an example of homologous structures.

Back

The forelimbs of humans, whales, and bats.

Front

Give an example of analogous structures.

Back

The wings of a butterfly and the wings of a bird.

Front

What is the main difference between homologous and analogous structures?

Back

Homologous structures arise from a common ancestor, while analogous structures do not.

Front

What does the term 'vestigial structures' refer to?

Back

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

Front

What is an example of a vestigial structure in humans?

Back

The appendix.

Front

How do analogous structures demonstrate convergent evolution?

Back

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

Front

What is the significance of studying homologous structures in biology?

Back

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

Front

What role do embryological similarities play in understanding evolution?

Back

They indicate that different species may share a common ancestor during early development.