Save
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
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

WGU-SSC1 ch 2

Western Governor's University, General Education Social Science, chapter 2

QuestionAnswer
A process that intervenes to ensure that organisms achieve an adjustment to their enviornment that is beneficial. adaption
A prehuman who lived from about 4.5 million years ago. (researchers disagree on the certainty of this) Australopithecus
Carriers of genes, or the hereditary blueprints of organisms. Each huan inherits a set of 23 chromosomes from each parent. chromosomes
The closest predecessors of perhaps contemporarites of modern humans, who lives about 35,000 years ago. They were expert toolmakers and artisits, and they lived in tribes that displayed evidence of rules and kinship systems. Cro-Magnon
Change in gene frequencies is promoted because an adaptation to a new environment is needed. directional selection
Deoxyribonucleic acid. A complex biochemical substance that is the basic building block of life. it determines the inheritance of specific traits. DNA
Period of sexual receptivity and ability to conceive. estrus
A theory that explains change in living organisms and variation within species. Evolution functions according to processes of natural selection, mutation, genetic drift, gene flow, and speciation. evolution
The movement of genes from one gene pool to another. It results in new combinations of genes in the offspring. gene flow
The proportion in which the various genes occur in an inbreeding population. gene frequency
All of the genetic material available to a population to be inherited by the next generation. gene pool
Hereditary unites that transmit an individual's traits. They are contained in the chromosomes and made up of DNA. genes
The fluctuations in frequencies of specific traits in a small, isolated population, so that visible differences between an isolated population and the population from which it broke away become obvious. genetic drift
The science of heredity. genetics
The actual genetic composition of an organism, which is not necessarily expressed. genotype
Prehuman creatures who walked on two feet. hominids
The upright hominid thought to be a direct ancestor of modern humans. Homo erectus
A species whose fossils date back 75,000 years (or perhaps 195,000 years) and includes Neanderthals. The species label for modern humans is Homo sapiens sapiens, whose fossils date back 30,000 year and include Cro-Magnon. Homo sapiens
A permanent change in genetic material. mustation
A process of evolution in which random traits are tested for their survival value; the successful traits eventually become extinct. natural selection
A subspecies of Homo sapiens (but some consider them hominids) whose fossil remains date from 70,000 to 35,000 years ago. They are known to have buried their dead. Neanderthal
The physical, or outward, appearance of an organism. phenotype
An order of mammals to which monkeys, apes, and humans belong. primates
a hominoid having hominid-like features, dated between 14 and 18 million years ago. Ramapithecus
When natural selection promotes the status quo rather than change, because change would be determined to the organism's adaption to its environment. stabilizing selection
Created by: marquez817
Popular Science 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