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

Sign up for an account

Already have a Quizlet account? .

Create an account



Ablility to survive and reproduce


Change over time

Gene Pool

Combined genetic information of all members of a population

Reproductive Isolation

Seperate populations cannot interbreed

Index Fossil

Easily recognized age determined by radio active dating or another absolute method


Two species evolve in respronse to changes in eachother
Ex: Flower and Bird

Punctuated Equilibrium

Long stable periods interrupted by brief periods of evolution any change

Adaptive Radiation

A small group of species have evolved into several different forms that live in different ways

Natural Selection

process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest

Radioactive Dating

age calculated based on amount of remaining radioactive isotiope found

Homologous structures

Parts similar in structure
(Ex: Flippper of whale and Arm)

Directional Selection

One end of curve has higher fitness than others


Individuals near the center of the curve have higher fitness


formation of new species

What is the name of the islands Darwin made many of his observations?


What was James Huttons and Charles Lyells thory about the age of Earth, as it's related to evolutoin?

The Earth was old enough for evolution to occur

What was Lamrack's main theory of evolution?

Lamarck believed that organisms tried to make themselves better during their lifetimes and that the improvements or changes they made would be passed on to their offspring.

What was Thomas Malthus' main theory about food and population growth? What organisms does his theory apply to?

If our population keeps growing then we're going to run out of food. Humans?

When lions prey on a herd of antelopes some antelopes are killed and some escape. Which concept of natural selection might describe this situation

Survival of the Fittest

What would cause a change in the relative frequency in a gene pool

Gene Shuffling

In a population of finches one group has short thick beaks, another group has long narrow beaks. What type of selection is this?


One the Galapagos islands, Charles Darwin observed_______ species with traits best suited to their_______.


If a mutation of a new skin color of a lizard population is introduced, what might determine whether the frequency of new allele will increase?

Natural selection

body parts that share a common function not structure (Bats and Birds)

Analogous body Structures

Inherited from ancestors from ancestors but lost all, but most of its function

Vestigal Body Structures

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