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

bio

speciation

QuestionAnswer
species latin for "kind"
biological species concept a population or group of populations whose members are actually or potentially interbreeding with one another but are reproductively isolated for other such groups
reproductive isolating mechanisms any factor that impedes two species from producing viable, fertile hybrids
prezygotic isolating mechanisms impede mating between species or hinder the fertilization of ova
Habitat (ecological or spatial) isolation two species live in different habitats within a given area; encounter each other rarely
Behavioral isolation special signals to attreact mates differ
temporal isolation two species breed at different times of day, different seasons, or different years
mechanical isolation closely related species are anatomically incompatible
gametic isolation mating occurs, but fertilization does not occur
Postzygotic isolating mechanisms fertilization occurs but something happens to zygote
Hybrid zygote abnormality genetci incompatibility between two species may abort development of hybrid at some embryonic stage
hybrid infertility production of offspring normal in every aspect but being sterile
low hybrid viability hybrids have lower survival
reinforcement strengthening of prezygotic barriers
speciation the formation of new (novel) species
macroevolution broad pattern of evolution over long time periods
allopatric speciation speciation takes place in populations geographically separated
sympatric speciation speciation takes place in geographically overlapping populations
hybrid zones areas of incomplete reproductive isolation
adaptive radiation relatively quick diversification of species from a single or a few ancestors when introduced to a variety of new environmental opportunities
specific coevolution (narrow sense) evolution in two species being brought about by reciprocal selective effects between the entities
diffuse (guild) coevolution species may evolve in response to a number of other species
Created by: slcorder
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