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The theory of endosymbiosis is based onA.evidence from the fossil record B.the knowledge that chloroplasts and mitochondria resemble bacteria C.similarities between chloroplasts and other organelles in animals D.the experiments in which bacteria were grown in plant cells and formed chloroplasts E.the knowledge that ribosomes are structures found in bacteria, plants, and animals

Answer :

Endosymbiosis is the theory that mitochondria and chloroplasts originated as independent bacterial cells that were engulfed by another cell and began functioning as organelles within that cell.

Answer: B

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