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

Biology

Chapter 27

QuestionAnswer
peptidoglycan a network of sugar polymers cross-linked by polypeptides
Gram stain used to classify bacteria by cell wall composition
Gram-positive bacteria have simpler walls with a large amount of peptidoglycan
Gram-negative bacteria have less peptidoglycan and an outer membrane that can be toxic
capsule a polysaccharide or protein layer covers many prokaryotes
fimbriae allow them to stick to their substrate or other individuals in a colony
Pili are longer than fimbriae and allow prokaryotes to exchange DNA
taxis the ability to move toward or away from a stimulus
plasmid a small DNA molecule within a cell that is physically separated from a chromosomal DNA and can replicate independently
endospores enable bacteria to lie dormant for extended periods
transformation when a prokaryotic cell can take up and incorporate foreign DNA from the surrounding environment
Transduction movement of genes between bacteria by bacteriophages (viruses that infect bacteria)
F factor piece of DNA required for the production of pili
R plasmids carry genes for antibiotic resistance
Obligate aerobes require O2 for cellular respiration
Obligate anaerobes poisoned by O2 and use fermentation or anaerobic respiration
anaerobic respiration form of respiration using electron acceptors other than oxygen
Facultative anaerobes can survive with or without O2
nitrogen fixation a process in which nitrogen (N 2) in the atmosphere is converted into ammonia (NH 3)
heterocysts photosynthetic cells and nitrogen-fixing cells that exchange metabolic products
biofilms surface-coating colonies that enable metabolic cooperation
extremophiles archaea that live in extreme environments
Extreme halophiles live in highly saline environments
Extreme thermophiles thrive in very hot environments
Methanogens live in swamps and marshes and produce methane as a waste product; strict anaerobes and are poisoned by O2
Mycoplasms the smallest known cells
Created by: danat214
 

 



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