Evolutionary History Vocabulary Review

Which species (I, J, or K) is the closest relative to Species H?

• Species I

• Species J

• Species K

• Neither

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The body structures for a population of chimpanzees were stable for a long time. Then, their body structures changed, making the chimpanzees stronger. Why did this happen?

• Organisms naturally become stronger over time.

• It is impossible to say without more information.

• The chimpanzee population wanted to be stronger.

• Their environment must have changed.

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What should be displayed on the branches of an evolutionary tree?

• ancestors

• descendants

• common ancestor populations

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What is the separation that causes an ancestor population to evolve into descendant species?

• evolution

• a barrier

• speciation

• stability

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Why would two different species share similar structures?

• Mutations randomly occur throughout generations.

• Both species share a common ancestor population.

• Structures randomly appear over time.

• All of the above.

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Which populations' structure would be most similar to the common ancestor population?

• A and B

• A and C

• B and D

• C and D

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Evolution is:

• the process of turning into a human

• a group of organisms of the same kind (in one or more populations) that do not reproduce with organisms from any other group

• the process by which species adapt to environmental changes over a very long time

• the process by which one population evolves into two or more different species

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A fossil turtle and a living hawk both have a structure in their neck called the atlas bone. What best explains why both species have an atlas bone?

• They inherited this structure from separate ancestor populations.

• It is impossible to say.

• They inherited this structure from a common ancestor population.

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An older population from which two or more species descended is a...

• descendant species

• organism

• common ancestor population

A paleontologist is:

• a scientist who studies weather

• a scientist who studies archaeology

• a geologist

• a scientist who studies fossils in order to understand the ancient history of life on Earth.

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