Unit 6 Evolution Study Set

A population of bacteria is treated with antibiotics. What are the possible outcomes for the surviving bacteria?

• The population will grow quickly

• All of the bacteria are going to be resistant.

• The bacteria will become endangered.

• Some may be resistant and survive

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One of the biggest ways that a species evolves is because some organisms with some traits survive and reproduce better than others.

• Natural Selection

• Coevolution

• Convergent Evolution

• Sexual Selection

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Genes for traits that help an organism be more successful in mating can expect to

• cause it to evolve into a new species

• become more common in the future

• cause the extinction of the species

• eventually be eliminated by natural selection

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An adaptation is

• any trait an organism possesses

• how an organism evolves during its own lifetime

• a gene an organism has

• a trait that helps an organism survive in its environment

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Genetic diversity is ultimately/mainly the result of

• meiosis

• viruses

• mutations

• reproduction

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Which of the following is not an example of evolution

• horses becoming taller and faster over millions of years

• all species of turtles in America coming from the same anceser

• Human jaws shrinking over time

• A caterpillar going through a change into a moth

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Which of the following does not increase genetic variation?

• Mutatuins

• Gene flow

• Mitosis

• Crossing Over

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Which of the following is not a principle of natural selection

• Most species produce more offspring than will actually reproduce

• organisms compete for limited resources

• evolution will occur as an organism gets older and learns more

Individuals that are well adapted to their environment will survive and produce ____.

• Fewer mutations

• more offspring

• stronger genes

• better traits

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Natural selection results in change over time by acting on traits that are ___.

• heritable

• new

• mutated

• better

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