Answer:
In the study of the origin and evolution of life on Earth, there are two separate processes: organic evolution and chemical evolution.
Organic evolution is the gradual emergence of new species from pre-existing ones through genetic variation, adaptation, and selection. It involves modifications to populations of animals' genetic makeup brought about by mutation, natural selection, genetic drift, and gene flow. At the level of particular organisms, populations, and species, organic evolution takes place.
Chemical evolution, on the other hand, refers to the process by which the first living organisms arose from simple organic compounds that existed on Earth billions of years ago. It involves the gradual development of more complex molecules from simple organic molecules, leading to the formation of the first living organisms. Chemical evolution occurs at the molecular level, and it involves the study of how complex organic molecules such as amino acids, nucleotides, and lipids, can form from simpler compounds under conditions that may have existed on early Earth.
In summary, organic evolution refers to the development of new species through genetic variation and natural selection, while chemical evolution refers to the process by which simple organic molecules evolved into more complex molecules, eventually leading to the development of the first living organisms.