Prebiotic soup accumulated mainly in
Dilute organic molecules produced atmospherically would rain into basins and concentrate. Oceans offered large volume, protection from extreme ultraviolet and dissolved ions catalyzing polymerization. Coacervates and other protobionts could assemble in this aqueous medium, maintaining internal chemistry distinct from surroundings. Alternative sinks like atmosphere or dry soil would not retain organics effectively. Geological evidence of early oceans and marine microfossils supports Oceans as primary site for prebiotic accumulation and emergence of chemoheterotrophs. This concept integrates genetics, ecology and molecular evidence, frequently tested in NEET, GATE and CSIR-NET, highlighting links between genotype, phenotype and environment.
Ref: Alberts et al., Molecular Biology of the Cell, 6th ed., Chapter 1: Origin of Life.