Key Points on Endosymbiotic Theory

Endosymbiotic Theory

• Eukaryotic cells arose from prokaryotic cells engulfing bacteria.
• Engulfed bacteria evolved into organelles, such as mitochondria.
• DNA sequencing indicates the mitochondrion has genetic sequences similar to Rickettsia prowazekii (a type of bacteria).
• Implications suggest organelles in eukaryotic cells may genetically resemble species of:
  • A. plants
  • B. animals
  • C. fungi
  • D. archaea