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

Bio117 CH26

Freeman Chapter 26 Vocab

QuestionAnswer
allopatric speciation The divergence of populations into different species by physical isolation of populations in different geographic areas. Compare with sympatric speciation.
allopatry Condition in which two or more populations live in different geographic areas. Compare with sympatry.
allopolyploid The state of having more than two full sets of chromosomes (polyploidy) due to hybridization between different species.
biogeography The study of how species and populations are distributed geographically.
biological species concept The definition of a species as a population or group of populations that are reproductively isolated from other groups. Members of a species have the potential to interbreed in nature to produce viable, fertile offspring but cannot produce viable, fertile
cryptic species A species that cannot be distinguished from other species by easily identifiable morphological traits.
hybrid zone A geographic area where interbreeding occurs between two species, sometimes producing fertile hybrid offspring.
monophyletic group or lineage An evolutionary unit that includes an ancestral population and all of its descendants but no others. Also called a clade or lineage. Compare with paraphyletic group.
morphospecies concept The definition of a species as a population or group of populations that have measurably different anatomical features from other groups. Also called morphospecies concept. Compare with biological and phylogenetic species concept.
phylogenetic species concept The definition of a species as the smallest monophyletic group in a phylogenetic tree. Compare with biological and morphological species concept.
polyploidy The state of having more than two full sets of chromosomes.
postzygotic isolation Reproductive isolation resulting from mechanisms that operate after mating of individuals of two different species occurs. The most common mechanisms are the death of hybrid embryos or reduced fitness of hybrids.
prezygotic isolation Reproductive isolation resulting from mechanisms that operate after mating of individuals of two different species occurs. The most common mechanisms are the death of hybrid embryos or reduced fitness of hybrids.
reinforcement In evolutionary biology, the natural selection for traits that prevent interbreeding between recently diverged species.
sister species Closely related species, which occupy adjacent branches in a phylogenetic tree.
species A distinct, identifiable group of populations that is thought to be evolutionarily independent of other populations and whose members can interbreed. Generally distinct from other species in appearance, behavior, habitat, ecology, genetic characteristics,
subspecies A population that has distinctive traits and some genetic differences relative to other populations of the same species but that is not distinct enough to be classified as a separate species.
sympatric speciation The divergence of populations living within the same geographic area into different species as the result of their genetic (not physical) isolation. Compare with allopatric speciation.
sympatry Condition in which two or more populations live in the same geographic area, or close enough to permit interbreeding. Compare with allopatry.
vicariance The physical splitting of a population into smaller, isolated populations by a geographic barrier.
Created by: Liwa91
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