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

Sign up for an account

Already have a Quizlet account? .

Create an account


the process of change over time from simple to more complex


preserved remains or traces of ancient organisms

tendency toward perfection

Lamarck proposed that all organisms have an innate tendency toward complexity and perfection. As a result, they are continually changing and acquiring features that help them live more successfully in their environments.

artificial selection

nature provides the variations and humans select those they find useful

natural variation

differences among individuals of a species; results from mutation and sexual reproduction

common ancestor

idea that we are all related


any characteristics that give an advantage for survival

descent of modification

small changes are passed onto generations over long period time

relative dating

helps to determine whether a fossil is older or younger than others by placing rock layers and their fossils in a temporal sequence

index fossils

distinctive fossils used to establish and compare the relative ages of rock layers and fossils they contain

half life

time required for half of the radioactive atoms in a sample to decay

carbon 14

elements used for younger than 60,000

potassium 40 uranium 238 rubidium 87

older than 100,000

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