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.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

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


Lecture 3

Extinction the state or process of a species, family, or larger group being or becoming extinct
Extant to refer to taxa, such as species, genera and families, that are still in existence, meaning still alive
Extinct the termination of an organism or of a group of organisms (taxon), usually a species
Succession fossils from one region similar to extant organisms from that same region
Fossil any trace of an organism that lived in the past
Homologous similar in position, structure, and evolutionary origin but not necessarily in function
Transition fossil any fossilized remains of a life form that exhibits traits common to both an ancestral group and its derived descendant group
Vestigial structures function less or rudimentary organ in one species that has an important function in other species
Analogous structures do not share a common ancestor with the same structure
Developmental homology similarities during development, despite differences in adults
Genetic homology the conserved function of homologous genes across species
Molecular homology similarities among organisms at the molecular level
Created by: stacymdez