What is the endosymbiotic theory and how does it relate to the evolution of cells?
Understand the Problem
The passage discusses the early forms of life on Earth, focusing on bacteria and the origins of cells, particularly through the lens of the endosymbiotic theory. It outlines the role of bacteria, archaea, and the evolutionary significance of symbiotic relationships in cellular development.
Answer
The endosymbiotic theory explains eukaryotic cell evolution through symbiosis between engulfed prokaryotic cells.
The endosymbiotic theory suggests that eukaryotic cells evolved when one prokaryotic cell engulfed another, forming a symbiotic relationship. Mitochondria and chloroplasts within eukaryotic cells were once independent prokaryotic organisms, giving insight into how complex cells developed.
Answer for screen readers
The endosymbiotic theory suggests that eukaryotic cells evolved when one prokaryotic cell engulfed another, forming a symbiotic relationship. Mitochondria and chloroplasts within eukaryotic cells were once independent prokaryotic organisms, giving insight into how complex cells developed.
More Information
Endosymbiotic theory is widely supported by evidence such as the double membranes and distinct DNA found in mitochondria and chloroplasts, resembling that of certain prokaryotes.
Tips
A common mistake is assuming that mitochondria and chloroplasts evolved from eukaryotic cells, whereas they have prokaryotic origins.
Sources
- 7.8: The Endosymbiotic Theory - Biology LibreTexts - bio.libretexts.org
- Endosymbiotic Theory | Ask A Biologist - Arizona State University - askabiologist.asu.edu
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