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

Bio Evolution Vocab

complementary base pairing either of the nucleotide bases linked by a hydrogen bond on opposite strands of DNA
convergent evolution organisms not closely related, independently evolve similar traits as a result of having to adapt to similar environments
divergent evolution is the process of tracing back two or more species to their common ancestor.
deoxyribonucleic acid a self-replicating material present in nearly all living organisms as the main constituent of chromosomes
double helix a pair of parallel helices intertwined about a common axis, especially that in the structure of the DNA molecule.
evolutionary change a gradual change in the characteristics of a population of animals or plants over successive generations
gene flow is the transfer of alleles or genes from one population to another.
genetic drift variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce
gradual change model species are generally morpholgically stable, changing little for millions of years.
mutation, natural selection is the differential survival and reproduction of individuals due to differences in phenotype
nitrogenous base a nitrogen-containing molecule that has the same chemical properties as a base
non-random mating occurs when the probability that two individuals in a population will mate is not the same for all possible pairs of individuals.
punctuated equilibrium model The theory that new species evolve suddenly over brief periods of time, followed by longer periods during which there is no genetic change
speciation the formation of new and distinct species in the course of evolution.
sugar-phosphate backbone forms the structural framework of nucleic acids, including DNA and RNA
Created by: rc.squad