what are the two causes of evolution on life on the earth
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Earth and its atmosphere are continuously altered. ... Such constant change has characterized Earth since its beginning some 4.5 billion years ago. From the outset, heat and gravity shaped the evolution of the planet. These forces were gradually joined by the global effects of the emergence of life.
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Earth and its atmosphere are continuously altered. Such constant change has characterized Earth since its beginning some 4.5 billion years ago. From the outset, heat and gravity shaped the evolution of the planet. These forces were gradually joined by the global effects of the emergence of life.
There are four principles at work in evolution—variation, inheritance, selection and time.
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