Darwin Finches

What is Darwin’s theory of evolution by natural selection?

• organisms that migrate for shorter periods of time are most likely to survive and reproduce.

• organisms that migrate for longer periods of time are most likely to survive and reproduce.

• organisms with traits best suited to their environment are most likely to survive and reproduce.

• organisms with traits best suited to their environment are most likely to migrate.

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What is a small change in a trait that makes an individual slightly different from other members of its species?

• variation

• natural selection

• adaptation

• selective breeding

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When did Charles Darwin visit the Galapagos Islands?

• 1821

• 1831

• 1835

• 1845

Darwin used the Galápagos finches as evidence that

• traits are not hereditary.

• living things change over time.

• birds are different than other species.

• organisms in a species have no relation to one another.

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After the Beagle's voyage ended, Darwin spent time thinking about the ______ of Galápagos finches.

• beauty

• habitats

• rarity

• traits

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What question regarding the traits of Galápagos finches did Darwin consider for many years?

• How had an original finch been modified in different ways for different purposes?

• Why were these finch species only found in certain parts of the world?

• Why couldn’t finches with narrow beaks consume a diet of seeds in addition to insects?

• How did this great variety of finch species survive in the same ecosystem?

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What did Darwin find especially remarkable about species of the Galápagos Islands?

• All of these species were birds.

• These species had very little biodiversity.

• Darwin could not study these species without the assistance of other naturalists.

• Many of these species resembled mainland South American species

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How does natural selection drive evolution?

• It does not; natural selection and evolution are entirely separate processes

• Before they can reproduce, individuals must adapt certain traits through natural selection.

• Within a generation, natural selection causes populations to eliminate unfavorable traits.

• Over time, natural selection causes living populations to evolve environmental adaptations.

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When individuals with certain inherited traits are more likely to survive and reproduce than those with less favorable traits, ______ occurs.

• genetic selection

• natural selection

• favored survival

• struggle for existence

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Which statement about adaptations is true?

• They are inherited.

• They are developed quickly.

• They cannot change over time.

• They are the same in every species.

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