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Home Q & A Board Biology-Related Homework Help General Biology
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lacerna92 lacerna92
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6 years ago
The geologic time scale is often subdivided on the basis of ____.
  a. the appearance of different radioactive isotopes in different strata
  b. levels of background extinction
  c. periods of mass extinction
  d. the appearance of new species
  e. climate change

Question 2

Which body of evidence is least supportive of plate tectonics theory?
  a. the worldwide fossil record
  b. the global distribution of existing species
  c. the sea-floor spreading
  d. the shape of the continents
  e. the size of the oceans
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luckydon4luckydon4
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6 years ago
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lacerna92 Author
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#2
6 years ago
All are answered correctly
wrote...
#3
6 years ago
Happy to help
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