Busy. Please wait.
Log in with Clever

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever

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.
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

Levels of Organizati

Atom Oxygen atoms are essential to keep your cells working. Oxygen atoms are found in our atmosphere, which helps us breathe.
Molecule Water molecules make up rivers, which are sources of drinking water. Carbon dioxide molecules are dangerous to your body, and you breathe it out.
Macromolecules The marcomolecule nucleic acid makes up or DNA. The macromolecule carbohydrates are essential to organisms for energy.
Organelles The organelle nucleus control all the function of the cell. The organelle mitochondria gets rid of carbon dioxide that plants use to make oxygen.
Cell The cell's function is essential for the organism to live. The flu virus kills cells to spread the virus in the organism, and they spread it to other organisms.
Prokaryotes The flu virus spreads in schools every year. The strep virus is a prokaryote which makes an organism ill.
Eukaryote Human cells are all eukaryotes, they have nucles and membrane bound organelles. Eukaryotes benefit other eukaryotes in the world.
Tissue Skin cells join to make skin tissue which can can be donated. Tissue can be used to repair mangled bodies.
Organs The stomach makes sure food gets digested properly. Organs can be donated for other in the world.
Organ system The respiratory system pumps blood throughout the body in the organism. The respiratory system emits carbon dioxide which plants use to produce oxygen.
Organism Fungi depend on decomposed organisms for food The bacteria in our small intestine are seperate organisms.
Population Humans interact with other humans in their homes. Humans interact with humans in cities and in biological environments.
Community Humans interact with their pet dogs in their homes. Humans interact with the bugs in the wild.
Ecosystem In homes, humans interact with their pets by giving them water and food to eat. In underwater biomes, fish interact with algae and the water.
Biosphere Humans are part of the biosphere, by emiting carbon dioxide. All areas of life on Earth are part of the biosphere.
Created by: s715122
Popular Biology sets




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