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 8

Macro evolution major evolutionary change. The term applies mainly to the evolution of whole taxonomic groups over long periods of time.
Micro evolution evolutionary change within a species or small group of organisms, especially over a short period
Gene flow transfer of alleles into or out of a population as a result of the movement of fertile individuals or their gametes (e.g. pollen)
Genetic drift Change in the genetic composition of a population caused by chance events unrelated to fitness that shrink the population size
Bottleneck (population stays in the same place) Sudden population decrease changes allele frequencies. Can have huge effect in one generation entirely by chance
Founder effect (subset separates to “found” a new population) A small number of individuals start a new population and the gene frequencies of the new populations are different from the source population
Created by: stacymdez