• The first cells were probably no more than organic compounds, such as a simplistic RNA, surrounded by a membrane.
  • Over time, as other organic compounds such as DNA and proteins developed, cells also evolved into more complex structures.
  • Once a cell was able to be stable, reproduce itself, and pass its genetic information to the next generation, then there was life.
  • One cell (or group of cells), called the last universal common ancestor (LUCA), gave rise to all subsequent life on Earth.
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