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.
Didn't know it?
click below
Knew it?
click below
Don't know
Remaining cards (0)
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 13

Evolution and Natural Selection

population a group of organisms of the same species that line in the same area
biological evolution the change in the gene pool of a population over time
gene pool the genes found within a population
acquired trait a trait that comes from an organism's behavior
descent with modification the theory that more recent species of organisms are changes descendants of earlier species
natural selection the process by which organisms best suited to the environment survive, reproduce, and pass their genes to the next generation
common descent a theory that present organisms descend from past organisms
adapt to change genetically over generations to become more suited to the environment
modern synthesis a theory that states evolution involves changes in a population's gene pool over time
sedimentary rock the rock formed from pieces of other rock and organic matter that have been pressed and cemented together
fossil record the history of life on the earth, based on fossils that have been discovered
biogeography the study of the geographical distribution of fossils and living organisms
anatomy the structure of an organism
comparative anatomy the study of anatomy of different species
homologous structure the body parts that are similar in related animals
molecular biology the study of the biochemical and molecular processes within cells
geologic time all the time that has passed since the earth formed
paleontologist a scientist who studies fossils
radioactive element an element that decays to form another element
geologic time scale a table that divides the earth's history into time periods
invertebrate an animal that does not have a backbone
vertebrate an animal that has a backbone
amphibian a vertebrate that lives at first in water and then on land
reptile an egg-laying vertebrate that breathes with lungs
plate techtonics a theory that the earth's surface is made of large sections of crust that move
continental drift a theory that the major landmasses of the earth move
magma hot, liquid rock inside the earth
plate a large section of the earth's crust that moves
crust the outer layer of the earth
recombination the creation of new combinations of alleles in offspring
gene flow the movement of genes into or out of a population
genetic drift the random changes in the gene pool of a small population
endangered a condition in which there are almost no organism of a certain species
extinction the death of all members of a species
habitat the place where an organism lives
Hardy-Weinberg equilibrium the principle that states the frequencies of alleles in a population do not change unless evolutionary factors act on the population
fossil the remains or impressions of an organism that lived in the past
Created by: mrspuffisphat21



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:
restart all cards