Early Ideas About Evolution

How do scientists make inferences about evolutionary relationships?

• By comparing the early development of different organisms

• By studying the migration patterns of birds

• By observing the behavior of animals in the wild

• By analyzing the diet of ancient humans

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What is a possible future outcome for Abert's squirrel and the Kaibab squirrel?

• They will become identical.

• They will remain the same species forever.

• They will become different from each other, forming separate species.

• They will become extinct.

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NGSS.MS-LS4-4

This image is an example of

• vestigial sttructures

• similar embryology

• geographic distribution

• fossil record

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The diagram shows data on the evolution of horses. The data in the diagram is evidence that —

• a new species of horse suddenly appeared

• horses slowly developed over time

• horses have similar stages of rapid embryological development

• horses have a common ancestry with other hooved animals

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NGSS.MS-LS4-1

NGSS.MS-LS4-2

If an organism has a vestigial structure, that structure likely once had a function in a(n)

• close relative

• early ancestor

• unrelated organism

• embryological stage

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• Homologous
• Vestigial
• Analogous

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What do fossils show about organisms that lived in the past?

• They were very similar to organisms alive today

• They were very different than organisms alive today

• They were all aquatic

• They were all herbivores

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What can scientists infer by examining fossils?

• The diet of ancient humans

• The structures of ancient organisms

• The migration patterns of birds

• The behavior of modern animals

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NGSS.MS-LS4-2

What does a branching tree diagram show?

• How different groups of organisms are related

• The age of different species

• The migration patterns of animals

• The diet of various species

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Who is known for the theory of inheritance of acquired characteristics?

• Charles Darwin

• Jean-Baptiste Lamarck

• Gregor Mendel

• Alfred Russel Wallace