Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account


A change in an organisms DNA (a special trait) of an organism *Can be harmful or helpful.


Any variation that makes an organism better suited to it's environment.


A permanent change in your DNA (genetic material) of an organism *Can be harmful or helpful.

Natural Selection

A process that weeds out the weak and allows for the strong to reproduce and pass down their traits.


The gradual change in inherited characteristics over time:graduated (millions of years) punctuated equilibrium (shorter time period).


A group of the same organism in a specific place/area.


When no more of a species exists.

Charles Darwin

A famous naturalist that used the term natural selection to describe his theories on evolution.

Homologous structure

Having the same structure but different function

Analogous structure

Having different structures but the same function


Believe individuals pass on traits that were developed during their lifetime

Survival of the fittest

Individuals with traits best suited to their environment are more likely to survive and reproduce

Vestigial Structure

Structures that are currently useless but previous served a purpose

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording