—Theories suggest that the first organic molecules were amino acids and nucleotides.
1. Organic Molecules: these may have also come on Earth from comets or meteorites. When biochemists added the molecules to water, they formed vesicles,which may be the predecessor to cells.
2. Building Larger Organic Compounds: How did these form without enzymes? Ocean water containing organic molecules came on a hot surface. After drying, they bonded together to form larger compounds.
3. Early Genetic Material: Some scientists hypothesise that some of the 1st organic molecules to form & self replicate were RNA molecules. (Called RNA World Hypothesis.)
Formation of Microspheres:
Life on Earth: