evidence behind the endosymbiosis theory?
Mitochondria and chloroplasts contain their own DNA, replicate, contain their own ribosomes, and are the size of prokaryotes.
The endosymbiosis theory proposes that eukaryotic cells evolved from a symbiotic relationship between different types of prokaryotic organisms. There is substantial evidence to support this theory, including:
1. Similarities between organelles and bacteria: The mitochondria of eukaryotic cells bear striking similarities to free-living bacteria, such as the fact that mitochondria have their own circular DNA and replicate independently of the host cell.
2. Endosymbiosis in modern organisms: There are many examples of modern symbiotic relationships between different types of organisms that involve endosymbiosis. For example, some species of bacteria are found living inside larger organisms, providing nutrients and other benefits, just as the mitochondria provide energy to eukaryotic cells.
3. Fossil evidence: There is fossil evidence of ancient eukaryotic cells that contain structures that resemble bacterial cells, further supporting the idea that eukaryotic cells evolved from symbiotic relationships with bacteria.
4. Genetic similarities: Analysis of the DNA in modern organisms reveals that there are many similarities between the genetic material of mitochondria and bacterial DNA, providing further evidence for the theory of endosymbiosis.
Overall, the endosymbiosis theory is widely accepted by scientists as a plausible explanation for the evolution of eukaryotic cells.
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Unraveling the Origins of Eukaryotic Cells: The Compelling Evidence for the Endosymbiosis Theory.