Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
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. Your email address is only used to allow you to reset your password. See 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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
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

Biology Chapter 15.2

TermDefinition
Fossil The trace or remains of an organism that lived long ago, most commonly preserved in sedimentary rock.
Superposition A principle that states that younger rocks lie above older rocks if the layers have not been disturbed.
Relative Age The age of an object in relation to the ages of other objects.
Absolute Age The numeric age of an object or event, often stated in years before the present, as established by an absolute-dating process, such as radiometric dating.
Biogeography The study of the geographical distribution of living organisms and fossils on Earth.
Homologous Structure Anatomical structures in one species that, compared to other anatomical structures in another species, originated from a single anatomical structure in a common ancestor of the two species.
Analogous Structure An anatomical structure in one species that is similar in function and appearance, but no in evolutionary origin, to another anatomical structure in another species.
Vestigial Structure A structure in an organism that is reduced in size and function and that may have been complete and functional in the organism's ancestors.
Phylogeny The evolutionary history of a species or taxonomic group; the relationships by ancestry among species or taxonomic groups.
Created by: DragonT20
Popular Biology sets

 

 



Voices

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:
Retries:
restart all cards