Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


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
Know
remaining cards
Save
0:01
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:
Retries:
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

Biology Evolution

TermDefinition
gene shuffling creates new variation by changing parts of the genetic code
gene pool all the genes within a population
directional selection occurs when natural selection favors one of the extreme variations of a trait
stabilizing selection both extremes are selected against
disruptive selection average phenotype selected against
gene flow members of one population move to another population and breed
genetic drift change in allele frequency due to random effects
bottleneck effect randomly remove large numbers of individuals from a population
founder effect small part of population removes itself from the larger population
geographical isolation separated by geographical barriers
behavioral selection separated by behavioral differences and don't mate
temporal isolation Don’t reproduce at the same time
reproductive isolation cannot mate and produce offspring
Hardy-Weinberg equilibrium allelic frequency stay the same
adaptive radiation species diversifies into many new species
convergent evolution species evolve to a similar form from different ancestors and adaptive to similar environment
coevolution species evolve together because of a close ecological relationship
punctuated equilibrium evolution shows long stable period and then rapid burst of change
Created by: mathangis17