Evolution Unit Review

One of the major elements of natural selection is that all species have genetic......

• digression

• stability

• variation

• melanism

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An adaptation is.....

• any trait an organism possesses

• how an organism evolves during its lifetime

• a gene an organism has

• a trait or behavior that helps an organism survive

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Genes for traits that help an organism be more successful reproductively can be expected 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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Genetic diversity is ultimately/mainly the result of

• meiosis

• viruses

• 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 tortoises in the Galapagos islands descending from a common ancestor.

• Human brains becoming larger over time.

• A caterpillar going through a change into a butterfly.

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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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Which pattern of evolution results in one species splitting into many over time?

• coevolution

• divergent evolution

• convergent evolution

• sexual selection

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Organisms that live in similar environments, such as the ocean, often have similar adaptations. This is often due to

• convergent evolution

• coevolution

• gradualism

• sexual selection

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If scientists wanted to learn more about evolution by studying biochemistry, they would study all but one of these

molecules. Which molecule would NOT offer much information about the history of life?

• DNA

• proteins

• nucleic acids

• lipids (fats)

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Scientists can explore whether two different animal species have evolved from a common ancestor, using evidence

from all of the sources below except.......

• analysis of strands of DNA

• comparisons of bones and muscles

• comparisons of the experiences of each organism

• studies of embryos during development

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