Front

What do fossils show about the evolution of life forms?

Back

Fossils show how life forms present today are different than those from the past.

Front

What does it indicate if two organisms have similar DNA traits?

Back

They probably share a common ancestor.

Front

What is the term for the changes of species over time?

Back

Evolution.

Front

What is a homologous structure?

Back

Similar structures in different species that have a common evolutionary origin.

Front

What are vestigial structures?

Back

Structures that have lost their original function through evolution.

Front

What evidence do sedimentary rock layers provide?

Back

They provide evidence for how the environment has changed over time.

Front

What is natural selection?

Back

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

Front

What is speciation?

Back

The formation of new and distinct species in the course of evolution.

Front

What is the fossil record?

Back

The history of life on Earth as documented by fossils.

Front

What is the significance of embryonic development in evolution?

Back

Similarities in embryonic development among different species can indicate common ancestry.