Endosymbiotic Theory
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4 Terms
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What is endosymbiosis?
Endosymbiosis is a relationship in which one species lives inside another, and in this case was a positive mutualistic relationship.
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How did mitochondria originate?
A bacterial cell was taken up by an archaeal cell and evolved into the mitochondrion.
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How did chloroplasts originate?
A cyanobacterium was taken up by a eukaryotic cell and evolved into the chloroplast.
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What evidence supports the endosymbiotic theory?
Mitochondria and chloroplasts have circular DNA, replicate by binary fission, use their own ribosomes similar to bacterial ribosomes, and have two membranes.
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