• The late Precambrian is the time from about 2 billion to half a billion years ago.
  • During this long span of time, Earth experienced many dramatic geologic and climatic changes.
  • Living things that could not adapt died out.
  • They were replaced by organisms that evolved new adaptations.
  • These adaptations included sexual reproduction, specialization of cells, and multicellularity.
  • This paved the way for a burst of new life, called the Cambrian explosion, during the following Paleozoic Era..
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