EVIDENCE OF EVOLUTION

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EVIDENCE OF EVOLUTION

• Review and Reinforce

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Seals flipper / Birds Wing
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1. Compare and contrast the bones of a birds
wing and a seals flipper?

• Both have essentially the same bones, though in
  somewhat different shapes.

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2. What do scientists infer from the similarities
between these two structures?

• They infer that the two species had a common
  ancestor.

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3. What do scientists call such similar
structures?

• Homologous structures

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4. Describe how DNA evidence might be used to
confirm scientists conclusions about any
relationship between birds and seals?

• The more similar the species DNA, the closer the
  relationship.

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5. What types of evidence do scientists use to
determine evolutionary relationships among groups?

• Scientists compare body structures, development
  before birth, and DNA sequences to determine the
  evolutionary relationships among organisms.

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6. What do similiarities in the early development
of organisms suggest?

• Similarities in early development suggest that
  species are related and have a common ancestor.

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7. Similar structures that related species have
inherited from a common ancestor are called?

• Homologous Structures

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8. A diagram that shows how scientists think
different groups of organisms are related?

• Branching tree