Select the correct answer from each drop-down menu. Wayne is writing an article on how life may have began near hydrothermal vents. Help him complete the sentences.
During early ages, the alkaline hot liquids from the vent met the acidic cold ocean water. The acidic ocean water produced a natural (protons, electrons, neurons)
gradient across mineral wall in rocks that are rich in catalytic minerals. This difference in conditions converted (potassium, carbon dioxiode, sulfur)
and hydrogen into organic carbon-containing molecules. These can react with each other to form organic molecules, such as nucleotides and amino acids.