EVIDENCE OF EVOLUTION II

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EVIDENCE OF EVOLUTION II

• pp 302-307

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Paleontology (Fossils)

• Provides geologic evidence of evolution
• Bones, molds, imprints
• Shows that life on Earth has not always been the
  same

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• Transitional species
• Descent with modification states that newer
  species are modified versions of older species
• - fossil record contains the intermediates

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• Relative (law of superposition) vs absolute
  dating (radioactive decay)
• Position of fossil in stratification indicates age

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Biogeography

• Certain animals in one location share similar
  traits (I.E. marsupials in Australia)

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• Similarities between species that live in
  different parts of the world shows common
  ancestry
• Reflects the breakup of a supercontinent

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Embryology

• Similar likenesses in embryos of organisms is
  evidence of descent with modification