Evolution Review 24

A trait or change in lifestyle that helps a plant or animal survive in its environment

• adaptation

• evolution

• homologous

• vestigial

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Organisms with the best suited adaptations for their environment are more likely to survive and reproduce than organisms that are not very well adapted

• natural selection

• artificial selection

• creationism

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A sudden change in the genes of an organism. It can cause abnormal physical traits.

• fossil

• extinction

• mutation

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Select the right word for this definition:

"in biology, changes that happen over time in the gene pool of a population."

• evolution

• extinction

• mutation

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All of the genetic information found in a population

• population

• genetic drift

• evolution

• gene pool

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If a new trait DOES help an organism survive, what may happen to it?

• It dies and its DNA is not passed on

• It survives and its DNA is passed on

• It changes its traits to adapt and survive

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Forces in the environment that result in a change in the population.

• Selective Pressure

• Evolution

• Niche Partitioning

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Hunters killed elephants with tusks resulting in more tuskless elephants. The hunters were the ___ pressure changing the population

• Selective

• Unusual

• Usual

• exceptional

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Which of the following is a factor in natural selection?

• Individuals of species compete with one another to survive.
• All species are genetically diverse.
• Individuals better able to adapt to changes leave more offspring.
• All are correct 

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What is meant by a “hole” in the fossil record?

• A hole in the fossil record does not exist

• There is no fossil evidence to bridge the gap that shows two species are somehow related. 

• Fossils are not evidence of evolution

• It means there is a bridge to show two species are somehow related,.

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