Evolution

Front

The gradual change in species over time is...

Back

Evolution

Front

Darwin wrote that organisms with traits that are best suited to the environment will ________________

Back

increase in number

Front

What characteristic did Darwin observe about the finches on the Galapagos Islands?

Back

Their beaks

Front

The natural differences between individuals of a species is called ___________.

Back

variation

Front

What is the advantage of having different shaped beaks?

Back

To be able to eat the food readily available in the environment.

Front

The struggle for existence against other members of an organism's species is

Back

Competition

Front

Darwin's expedition was called the Voyage of the _________.

Back

Beagle

Front

Remains of ancient organisms are called

Back

Fossils

Front

This picture is best known as

Back

embryology

Front

What do phylogenetic trees do?

Back

Help you visualize how species are related.