Origin of life on Earth started from microorganisms 3.5 million years ago. The formation of life on the planet was thought to have developed through four main stages: the abiotic synthesis of small molecules, the formation of larger organic molecules from these small molecules, its packaging into membraned droplets with conserved internal chemistry, and the subsequent development of self-replicating molecules.
The first forms of life on eart were thought to be _____.
A. single-celled plants
D. large animals such as dinosaurs
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