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

7thgradeBioTest9

Evololution and Natural Selection

QuestionAnswer
Charles Darwin was not surprised by the variety of living things he saw on his voyage around the world. false
Why was Darwin surprised by the variety of living things he saw on his voyage around the world? The animals were very different than the ones in England.
species A group of similar organisms that can mate with each other and produce fertile offspring.
fossil The preserved remains or traces of an organism that lived in the past.
Darwin observed the greatest diversity of organisms on the Galapagos Islands. true
Many Galapagos organisms were similar to organisms on mainland South America. true
Iguanas on the Galapagos Islands had small claws for climbing trees. false
What kinds of claws do iguanas on the Galapagos Islands actually have? What are they used for? Galapagos Island iguanas have large claws for climbing on rocks to feed on seaweed.
Darwin thought that the ancestors of Galapagos animals and plants came from mainland South America. true
All tortoises living in the Galapagos Islands looked exactly the same. false
Why don't all tortoises living in the Galapagos Islands looked exactly the same? Evolution and variations made each species and individual tortoise look at least slightly different.
What kind of beak do birds that feed on insects have? narrow, long ones
What kind of beak do birds that feed on seeds have? wide, short ones
adaptation A trait that helps an organism to survive and reproduce.
scientific theory A well-tested concept that explains many observations.
In his book "The Origin of Species", Darwin explained that evolution occurs by means of what? natural selection
Individuals with variations that make them better adapted to their environment won't survive. false
overproduction An effect caused by species producing more offspring than can survive.
competition An effect caused by limited food and other resources.
variations Differences between individuals of the same species.
Only traits that are controlled by genes can be acted upon by natural selection. true
Darwin knew all about genes and mutations. false
Why didn't Darwin know all about genes and mutations? DNA had not been discovered yet.
What evolves, individuals or populations? populations
evolution The change in gene frequency that occurs in a population over time.
population All the individual members of a particular species living in a given area.
In science,is a theory the same thing as a hypothesis.If so, why? No because a hypothesis is only an educated guess, a theory is a well-tested concept that explains many observations.
How old was Darwin when he sailed around the world to look at stuff? 22
What nationality was Darwin? British
How long was the cruise Darwin went on that sailed around the world? 5 years
Who owned the ship? the current queen of England
What was her majesty's ship called? the Beagle
gene pool All the genes that occur in a population.
What kind of rock are fossils usually found in? sedimentary rock
Where are younger fossils usually found? closer to the Earth's surface
embryo A not yet born, developing multicellular organism.
inference using clues to make a conclusion
Who was know as the father of genetics? Charles Darwin
homologous structures Similar structures that related species have inherited from a common ancestor, with different functions.
natural selection The process by which individuals that are better adapted to their environment are more likely to survive and reproduce than other members of the same species.
Biological fitness states what? That the most well-adapted individuals from one generation will usually leave the most offspring.
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