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

bio terms

terms and definitions for 14.1-3

TermDefinition
biogenesis the theory that living organisms come only from other living organisms
spontaneous generation an early and now disproved theory that living organisms come to life spontaneously from nonliving material
radiometric dating a method of determining the absolute age of an object by comparing the relative percentages of a radioactive (parent) isotope and a stable (daughter) isotope
isotope an atom that has the same number of protons (or the same atomic number) as other atoms of the same element do but that has a different number of neutrons (and thus a different atomic mass)
mass number the sum of the numbers of protons and neutrons in the nucleus of an atom
radioactive decay the disintegration of an unstable atomic nucleus into one or more different nuclides, accompanied by the emission of radiation, the nuclear capture or ejection of electrons, or fission
radioactive isotope an isotope that has an unstable nucleus and that emits radiation
half-life the time required for half of a sample of a radioactive isotope to break down by radioactive decay to form a daughter isotope
microsphere cell-like structure; made from solutions of simple organic chemicals; spherical in shape; composed of many protein molecules that are organized as a membrane
coacervate a mass of colloidal substances held together by electrostatic attraction
ribozyme a type of RNA that can act as an enzyme
archaea in a modern taxonomic system, a domain made up of prokaryotes that are distinguished from other prokaryotes by differences in their genetics and in the makeup of their cell wall; this domain aligns with the traditional kingdom Archaebacteria
chemosynthesis the production of carbohydrates through the use of energy from inorganic molecules instead of light
cyanobacteria a bacterium that can carry out photosynthesis, such as a blue-green alga
ozone a gas molecule that is made up of three oxygen atoms
endosymbiosis a mutually beneficial relationship in which one organism lives within another
Created by: Nunng17
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