Save
Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't know
Remaining cards (0)
Know
0:00
share
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

3.3

vocab

TermDefinition
periods eras are subdivided into periods
epochs periods are subdivided into epochs
mass extinction the extinction of many species on Earth within a short period of time
land bridge connects two continents that were previously separated
eons the longest unit of geological time
eras eons are subdivided into eras
geographic isolation the separation of a population of organisms from the rest of its species
cell theory all living things are made of one or more cells, the cell is the smallest unit of life, and all new cells come from preexisting cells
macromolecules form by joining many small molecules together
nucleic acids macromolecules that form when long chains of molecules called nucleotides join tofether
proteins long chains of amino acid molecules
lipid large macromolecule that dose not dissolve in water
carbohydrates one sugar molecule, two sugar molecules, or a long chain of sugar molecules
cell membrane flexible covering that protects the inside of the cell from the environment outside the cell
cell wall stiff structure outside the cell membrane
cytoplasm fluid inside the cell that contains salts and other molecules
cytoskeleton a network of threadlike proteins that are joined together
organells specialized functions
nucleus part of a eukrayotic cell that directs cell activities and contains genetic information stored in DNA
chloroplasts are membrane-bound organelles that use light energy and make food--a sugar called gluecose--form water and carbon dioxide in a process known as photosynthesis
Created by: patedor8182
 

 



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