Save
Upgrade to remove ads
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
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. Your email address is only used to allow you to reset your password. See 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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
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

chapter 11

evolution of population

TermDefinition
gene pool made up of all alleles of all of the individuals in a population
allele frequency measure of how common an allele is in a population
normal distribution the frequency is highest for the middle, or mean phenotype, and lowest at the two ends, or extreme phenotype
mircoevolution the observable change in the allele frequencies of a population over time
directional selection selection that favors a phenotype at one end, or extreme, of a range
stabilizing selection selection that favors the middle, or intermediate, phenotype
disruptive selection selection that favors both extreme phenotypes
gene flow movement of alleles from one population to another
genetic drift change in allele frequencies that are due to chance
bottleneck effect genetic drift that occurs after a poplution has been greatly reduced in size
founder effect genetic drift that occurs after a small number of individuals begin to live in a new area
sexual selection occurs when a trait increases mating success and gets passed on to the next generation
Hardy- Weinberg equilibrium model that can be used to study how population is changing
reproduction isolation when members of different population can no longer mate successfully
speciation the process of one species becoming two or more seperate species
behavioral isolation isolation caused by differences in courtchip and mating behaviors
geographic isolation when a river or mountain divides a population into two or more groups
temporal isolation when timing prevents reproduction between populations
convergent evolution unrelatated species evolve similar characteristics
divergent evolution closely related species evolve in different directions, and become increasingly different
coevolution the process on which two or more species evolve in response to changes in each other
extinction the permanent lodd of species from Earth
punctuated equilibrium describes this pattern: long periods of little change
adaptive radiation the rapid evolution of many diverse species from ancestral species
primates the group of animals that includes monkeys, apes, and humans
rodents the group of animals that includes mice, rats, and squirrels
Created by: ewaddell25
Popular Biology sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards