G7 Life Sciences 6.1.1 Theory of Evolution

1. Which event has been responsible for most extinctions?

• Rapid changes in climate

• Sudden volcanic eruptions

• Asteroids striking Earth

• The evolution of photosynthesis

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2. Which type of event is thought to have caused most species on Earth to have become extinct?

• Human activities

• Volcanic eruptions

• Air pollution

• Climate change

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3. Why does a sudden change in climate lead to the extinction of a species?

• The species moves to an area with a better climate.

• The species chooses not to evolve with the climate.

• The species finds it easier to survive in the new climate.

• The species lacks adaptations for the new climate.

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The photo shows a polar bear. Based on body structures, which animal is most closely related to the polar bear?

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How does the diagram support the claim that mammal species are closely related to one another?

• A. They are all adapted to the same environment.

• B. They all have the same kind of limb.

• C. Their skeletons have many similarities.

• D. Their bodies are all about the same size.

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Which example of similar structures indicates that the species are related?

• Webbed feet of frogs and ducks

• Wings of birds and insects

• Fins of sharks and penguins

• Forelimbs of bats and dogs

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What do fossilized dunes such as the one shown in the photo tell scientists about the environment?

• It used to be a glacier.

• It was once dry and windy.

• It used to be an ocean.

• It was once cold and wet.

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What do these fossilized forests tell scientists?

• Fossils have moved over time.

• The fossil record is all mixed up.

• This part of Arizona was once much wetter.

• Trees used to grow in much dryer conditions.

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What do fossilized ripple marks, such as the ones shown in the photo, tell scientists about the environment?

• A. A glacier slid over the area.

• B. A body of water flowed over the area.

• C. The area used to be windy and dry.

• D. The area used to be a forest.

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NGSS.MS-ESS2-2

Which statement best summarizes the theory of evolution?

• Individual organisms can choose to adapt to their environment.

• Natural processes cause living things on Earth to change over time.

• Living things in younger rocks are the common ancestors of those in older rocks.

• Fossils represent only a small percentage of all the species that have ever lived.

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