Assertion: organelle | /r/HasProperty | free-living organisms
Facets:
value: originally
type: OTHER
Source sentences:
text: The endosymbiosis hypothesis was first proposed in the 1960s by biologist Lynn Margulis, who believed that organelles such as chloroplasts and mitochondria, the energy-producing organelles in all eukaryotic organisms, were originally free-living organisms that were conscripted into the bodies of larger cells.