Evolution

The diagram illustrates an embryonic stage of two organisms.Which of the following can be determined by observing the embryos shown in the diagram? 

• The organisms share a common ancestry.
• The organisms belong to the same genus.
• The organisms are native to the same geographic areas.
• The organisms will grow into anatomically similar adults.

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Scientists are studying the evolutionary history of a group of plants in the United States, and they developed an evolutionary tree, as shown below.Which statement can be inferred from the evolutionary tree?

• Species 1 is most closely related to Species 8.
• Species 2 is most closely related to Species 3.
• Species 3 is most closely related to Species 7.
• Species 5 is most closely related to Species 6.

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Scientists are studying the evolutionary history of a group of plants in the United States, and they developed an evolutionary tree, as shown below.What information about the organisms best helps the scientists to determine the evolutionary relationships among them?

• DNA sequences
•  Anatomical features
• Habitat types
• Reproductive Strategies

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Natural selection is best described as

• a change in an organism in response to a need of that organism
• a process of nearly constant improvement that leads to an organism that is nearly perfect
• differences in survival rates as a result of different inherited characteristics
• inheritance of characteristics acquired during the life of an organism

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What can help a scientist know the approximate age of bones?

• the soil it is found in
• the index fossils in the area
• the type of rock it is formed in
• absolute dating

Dolphins have the same arm structure as wolfs, what type of evidence for evolution does this represent?

• DNA
• vestigial structures
• homologous structures
• embryology

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What would indicate that a series of fossils represent evolution?

• the fossils were identical
• the fossils were found in the same layers of rock
• the fossils show similarities
• the fossils were completely different

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What is embryology?

• the age of organisms
• the oldest stage of development
• the life span of an organism
• the earliest growth stage of development

Change over time is

• evolution
• generation
• growth
• biogenesis

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This makes an organism more suited to its enviornment

• species
• lifespan
• adaptation
• mutation

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