Prokaryotes and Eukaryotes

Prokaryotes and Eukaryotes upsc notes
  Context
    Article about evolution from prokaryotes to eukaryotes
  Evolution
    Origin of prokaryotes
      Simple organisms
      Single-celled
      No nucleus
    Development of eukaryotes
      Evolved from prokaryotes
      Introduction of mitochondria
      Packaging of DNA into nucleus
    Origin of mitochondria and chloroplasts
      Came from free-living bacteria
      Engulfed by ancient Archaea organism
      Mutually beneficial relationship formed over time
      Led to development of animals, fungi, plants
    Evolutionary process
      Gradual
      Various changes in structure, functions
  Differences between prokaryotes and eukaryotes
    Nucleus
      Absent in prokaryotes
      Present in eukaryotes
    DNA
      Circular in prokaryotes
      Linear in eukaryotes
    Membrane-bound organelles
      Absent in prokaryotes
      Present in eukaryotes (e.g., mitochondria, chloroplasts)
    Size
      Smaller in prokaryotes
      Larger in eukaryotes
    Reproduction
      Asexual (mostly) in prokaryotes
      Sexual and asexual in eukaryotes
    Examples
      Bacteria and Archaea are prokaryotes
      Plants, animals, fungi, protists are eukaryotes

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