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

Evolution Vocab

AP Bio

Divergent Evolution accumulation of differences between two groups until they are a new species
Convergent Evolution the independent evolution of similar features in different lineages
homologous structures structures in organisms that are similar because of common ancestry, may not share similar function
vestigial structures remnants of features that served a function in the organism's ancestors
analogous structures share similar function, but not common ancestry
two ways variation comes reproduction and mutations
directional selection graph shifts in one direction
stabilizing selection middle higher fitness
disruptive selection left and right
founder effect subgroups of original population relocated
bottleneck population decrease for at least one generation
hardy-weinberg conditions large population; no migration; no mutation; random mating; no natural selection
gene pool genes in population
alele frequency how common an allele is
homologous structures similar structures; common ancestry
paleontology fossils shows change in a species over time
biogeography similar species are found in similar ecosystems around the world
morphology comparing structures (analogous and homologous)
biochemical of molecular similarities in gene sequences proteins DNA
speciation new species formed
species make fertile offspring
geographic isolation barriers prevent mating
ecological isolation different habitats same region
temporal isolation different mating times
behavioral isolation different mating rituals
mechanical isolation morphological differences
gamete isolation sperm and egg don't recognize each other
hybrid inviability embryo can't develop
hybrid sterility/infertility baby not fertile
hybrid breakdown each generation less fertility
microevolution changing of allele frequencies in a population over time
macroevolution patterns of change over geologic time; determine phylogeny
gradualism species are always slowly evolving
punctuated equilibrium periods of massive evolution followed by periods with little to no evolution
adaptive radiation the diversification of different organisms into different forms filling ecological niches
Created by: 3j0mk1