Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

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.
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.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
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

Keenan - Unit 2 - S8

Vocabulary Science 8: Evolution & Genetics

Natural Selection Random genetic mutations occur within an organism’s genetic code and beneficial mutations are preserved because they aid survival.
genetics the science of studying how living things pass on characteristics (or traits) and its variations in their cell make
variations A modification in structure, form or function in an organism, deviating from other organisms of the same species or group.
homologous structures Structures derived from a common ancestor
analogous structures different species having the same appearance, structure or function but do not share common ancestor.
Embryological similarities comparisons of embryos that show relationships not evident in the fully formed anatomy.
Taxonomy (biological classification) The classification of organisms in a hierarchical system or in taxonomic ranks based on shared characteristics inferred from the fossil record or established by genetic analysis.
Law of Superposition The law that states that in any undisturbed sequence of rocks deposited in layers, the youngest layer is on top and the oldest on bottom, each layer being younger than the one beneath it and older than the one above it.
Phenotype genetic and environmental influences come together to create an organism's physical appearance and behavior.
Genotype genetic makeup of an organism
adaptation Selective pressures that influence the survival and reproduction of organisms over many generations and can change the distribution of traits in the population.
Theory of Evolution The theory states that species change over time.
Evolution adaptation of a species over generations