EVIDENCE OF EVOLUTION - PowerPoint PPT Presentation

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EVIDENCE OF EVOLUTION

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EVIDENCE OF EVOLUTION Review and Reinforce Seal s flipper / Bird s Wing 1. Compare and contrast the bones of a bird s wing and a seal s flipper? – PowerPoint PPT presentation

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Title: EVIDENCE OF EVOLUTION


1
EVIDENCE OF EVOLUTION
  • Review and Reinforce

2
Seals flipper / Birds Wing
3
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.

4
2. What do scientists infer from the similarities
between these two structures?
  • They infer that the two species had a common
    ancestor.

5
3. What do scientists call such similar
structures?
  • Homologous structures

6
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.

7
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.

8
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.

9
7. Similar structures that related species have
inherited from a common ancestor are called?
  • Homologous Structures

10
8. A diagram that shows how scientists think
different groups of organisms are related?
  • Branching tree
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