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

Unit 1

Evolution

TermDefinition
cell The smallest unit that can perform all life processes; cells are covered by a membrane and contain DNA and cytoplasm
stimulus Anything that causes a reaction or change in an organism or any part of an organism
homeostasis The maintenance of a constant internal state in a changing environment
DNA Deoxyribonucleic acid, a molecule that is present in all living cells and that contains the information that determines the traits a living thing inherits and needs to live
sexual reproduction Reproduction in which the sex cells from 2 parents unite to produce offspring that share traits from both parents
asexual reproduction Reproduction that does not involve the union of sex cells and in which one parent produces offspring that are genetically identical to the parent
theory of evolution The process by which inherited characteristics within a population change over generations - this leads to the rise of new species
selective breeding The human practice of breeding animals or plants that have certain desired traits; also called artificial selection
natural selection The process by which individuals that are better adapted to their environment survive and reproduce more successfully than less well-adapted individuals
variation The occurrence of hereditary or non-hereditary differences between different individuals of a population
mutation A change in the nucleotide base sequence of a gene or DNA molecule
adaptation A characteristic that improves an individual’s ability to survive and reproduce in a particular environment
extinction The death of every member of a species
fossil The trace or remains of an organism that lived long ago, most commonly preserved in sedimentary rock
fossil record The history of life in the geologic past as indicated by the traces or remains of living things
Created by: jessica.watson
 

 



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