Front

A more recent species that evolved from an ancestor population

Back

Descendant species

Front

A body structure in two or more species that features the same parts

Back

Shared Structure

Front

What is evidence that species share a common ancestor population?

Back

Shared Body Structures

Front

Species inherit ______ from ancestor populations.

Back

Body Structures

Front

A part of an organism

Back

Body Structure

Front

A scientist who studies fossils in order to understand the ancient history of Life on Earth

Back

Paleontologist

Front

What does the information about the body structures of a bandicoot, sea lion, and zebra tell you about their ancestors?

Back

All three species share an ancestor population, but sea lions and zebras share a more recent ancestor population. This is why neither shares the pouch structure for their babies.

Front

When two species share a structure that is not shared by the third species, what does this tell us?

Back

This is evidence that the first two species are more closely related than the third.

Front

What do we call a change in the DNA sequence of an organism?

Back

Mutation

Front

An older population from which two or more newer species descend

Back

Common ancestor population