Natural Selection

Organisms with differences/variations that are helpful will ______________________

• live longer
• become extinct
• show no change

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Darwin said that within a species there will be _________________________

• nothing different
• variation/differences

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What can happen to a species over time if some of the organisms have an advantage?

• The population will decrease
• The population will become extinct
• The population will slowly increase

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In recent years "SuperBugs" (bacteria that aren't effected by antibiotics) are becoming more and more common. How could natural selection explain this?

• Superbugs survive antibiotics and reproduce
• Antibiotics cause bacteria to become superbugs
• We have always had the same amount of superbugs; modern media just discusses them more.
• There is no reliable data on the origin of super bugs.

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Why do peppered moths tend to be the same color as the trees on which they live?

• The coloring goes along with tasting like the tree. 
• It keeps the moth the same temperature as the tree. 
• It makes the moths faster than the birds
• It makes the moths harder to see.

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Which of these is an example of natural selection?

• The largest animal in a population will have more opportunities for reproduction.
• Several species of organisms work together so that they all succeed.
• One species takes all the resources in an environment leaving none for others.
• Organism that are best suited to an environment tend to survive and reproduce more often.

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Humans have been a very successful species on earth.  They have very large, very diverse populations spread all around the world. As a result,

• Human have very limited ability to adapt to changes in the environment.
• Young humans have lower survival rates as compared to other species.
• Humans have a potential to adapt to various environmental changes.
• All humans are more disease resistant.

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Which of the following explains adaptation.

• An individual organism changes to meet its needs in the environment. These changes pass down to their offspring.
• The species as a whole changes their characteristics.
• Beneficial traits allow organism to survive and pass on those traits
• New characteristics arise in a species as needed.  If these traits are helpful, they are passed down.

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Darwin studied which of these species on Galapagos?

• Pigeons and tortoises
• Tortoises and finches
• Finches and Pigeons
• Zebras and Mockingbirds

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Evolution works by 

• individuals changing to suit their environment
• Individuals learned new traits and pass them on
• sudden change in the environment cause a species change 
• small changes pass down through many generations

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