Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Didn't know it?
click below
Knew it?
click below
Don't know
Remaining cards (0)
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how


CPO Chapter 13

an inherited trait that helps an organism survive. adaptatuion
the process of how organisms acquire adaptations over time evolution
an organism from which others have descended ancestor
a tree-like diagram that displays evolutionary relationships among living species and their ancestors. cladogram
bod structures that have a common origin but do not necessarily perform the same function. homologous structures
a historical sequence of life on Earth based on the sequence of fossils. fossil record
the process by which organisms with favorable adaptations survive and reproduce at a higher rate than organisms with less-favorable adaptations. natural selection
the variety of alleles in a population genetic variation
occurs when the environment changes and tha adaptations of a species are no longer sufficient for its survival. extinction
Organisms change over_______. time
All organisms are descended from ________ __________ by a process of branching. common ancestor
Evolution is _______. taking place over a long time. gradual
The mechanism of evolution is _________ __________. natural selection
Malthus was an early scientist that proposed the the human population grows fast than the _____ ______. food supply
Food shortages results in a ________ ____ ___________. struggle for existence
Created by: doakes27



Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards