Oparin called the initial colloidal aggregates of organic molecules:
AMicrospheres
BCoacervates
CLiposomes
DProtocells
Answer & Solution
Correct answer: B. Coacervates
Oparin's **coacervates** are colloidal aggregates of hydrophobic proteins and lipids — droplets that could grow, divide, and concentrate molecules. Sidney Fox proposed similar **microspheres** (proteinoid aggregates). Both prefigure protocells.
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