The process thought to have established the genetic code after billions of years is known as molecular evolution, particularly through the mechanisms of natural selection and genetic drift. Initially, simple RNA molecules are believed to have formed spontaneously and acted as both genetic material and catalysts, leading to the development of more complex forms of life. Over time, the transition from RNA to DNA as the primary genetic material allowed for greater stability and information storage, culminating in the genetic code we recognize today. This evolutionary journey reflects the gradual accumulation of mutations and adaptations that favored more efficient and effective means of heredity and protein synthesis.
evolution
Basically, random mutation and natural selection. With a little genetic drift and gene flow thrown into the mix. Evolution, the change in allele frequency over time in a population of organisms.
They go round and round the Sun, they have done that for some billions of years and they will continue for some more billions of years.
Up To Millions And Billions Of years
Yes, white dwarfs are extremely hot when they first form but over billions of years they gradually cool and dim as they release their leftover thermal energy into space. This cooling process is what eventually transforms them into cold, dark celestial objects known as black dwarfs.
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mass and energy
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This theoretical process is called Macro-evolution, or just "evolution." Some say that this does not occur beyond the microscopic level, others argue that is does. In any case, DNA had to be created before it could change within a life form.