LS.8.3.1 Evidence of Evolution

Front

What are analogous structures?

Back

Structures in different species that have similar functions but different evolutionary origins.

Front

What can be concluded if two organisms have analogous structures?

Back

They do NOT share a close common ancestor.

Front

What is evolution best described as?

Back

A gradual change in species over time.

Front

What is a vestigial structure?

Back

A body part that has lost its original function through evolution.

Front

Give an example of a vestigial structure in humans.

Back

The tailbone.

Front

What are homologous structures?

Back

Structures in different species that are similar due to shared ancestry.

Front

What can be concluded if two organisms have homologous structures?

Back

They share a common ancestor.

Front

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

Back

They have a common ancestor.

Front

What is the significance of fossil evidence in evolution?

Back

Fossils provide evidence of how species have changed over time.

Front

What does natural selection refer to?

Back

The process where organisms better adapted to their environment tend to survive and produce more offspring.