Homologous & Vestigial Structures Review

Front

What are homologous structures?

Back

Structures that evolved from a common ancestor but have different functions.

Front

What are analogous structures?

Back

Structures that have similar functions but evolved independently from different ancestors.

Front

What are vestigial structures?

Back

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

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 birds and the wings of insects.

Front

What do vestigial structures indicate about evolution?

Back

They indicate that a species has changed over time and that certain features are no longer necessary.

Front

How do homologous structures support the theory of evolution?

Back

They show how different species can evolve from a common ancestor.

Front

What is the main difference between homologous and analogous structures?

Back

Homologous structures share a common ancestry; analogous structures do not.

Front

What is an example of a vestigial structure in humans?

Back

The appendix.

Front

What type of structure is represented by whale pelvic bones?

Back

Vestigial structure.