Homologous vs Analogous Traits

Front

What are homologous structures?

Back

Structures in different species that share a common ancestor, but may have different functions.

Front

What is an example of homologous structures?

Back

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

Front

True or False: Homologous structures indicate common ancestry.

Back

True

Front

What are analogous structures?

Back

Structures in different species that have similar functions but do not share a common ancestor.

Front

What is an example of analogous structures?

Back

Bird wings and butterfly wings.

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 do not.

Front

Why do humans, birds, whales, and lizards have similar arm bones?

Back

Because they have a common ancestor.

Front

What is the significance of vestigial structures?

Back

They are remnants of structures that had important functions in ancestors but are no longer used in the same way.

Front

Give an example of a vestigial structure in humans.

Back

The human appendix.