Homologous, Analogous + Vestigial structures

Front

What are homologous structures?

Back

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

Front

What are analogous structures?

Back

Structures that have similar functions but evolved independently, not from a common ancestor.

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 are homologous structures.

Front

Give an example of analogous structures.

Back

Bird wings and insect wings are examples of analogous structures.

Front

Do analogous structures indicate common ancestry?

Back

No, analogous structures do not indicate common ancestry.

Front

What is the main difference between homologous and analogous structures?

Back

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

Front

What is an example of a vestigial structure in humans?

Back

The human appendix is an example of a vestigial structure.

Front

How do homologous structures support the theory of evolution?

Back

They provide evidence of common ancestry and evolutionary divergence.

Front

What is the significance of vestigial structures in evolutionary biology?

Back

They indicate evolutionary changes and adaptations over time.