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Bacteria that obtain its carbon from carbon dioxide (inorganic source) and its energy from complex carbon is known as chemotherapeutic bacteria. and the type mention in the above statement is known as chemolithoautotrophs.
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The endosymbiotic hypothesis concerns the origin of mitochondria and chloroplasts, two organelles contained within various eukaryotic cells. According to this hypothesis, these organelles originated as separate prokaryotic organisms that were taken inside a primordial eukaryotic cell.