Homologous, Vestigial, or Analogous?

Front

What are homologous structures?

Back

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

Front

Give an example of homologous structures.

Back

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

Front

What are vestigial structures?

Back

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

Front

Give an example of a vestigial structure in humans.

Back

Wisdom teeth are considered vestigial structures in humans.

Front

What are analogous structures?

Back

Structures that serve similar functions but are not derived from a common ancestor.

Front

Give an example of analogous structures.

Back

The wings of birds and insects are analogous structures.

Front

True or False: Homologous structures indicate a common ancestry.

Back

True

Front

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

Back

False

Front

What is the main difference between homologous and analogous structures?

Back

Homologous structures share a common ancestry, while analogous structures do not.

Front

What is an example of a vestigial structure in animals?

Back

Pelvic bones in whales are an example of vestigial structures.