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Gaathi, Date, Chapter t Evatution, 米, Evolution- Evoluution is the tuocess by which fropulation, 4 arganism acquires and pass novel traits, to anather., genexation, over large, the avrigin of neis species, diversity is reated ., from one, Its, time explain, stretches, of, and ultimately, accurence, a vast, The universe is about, billion, years, aid, 20, earth is about 4.5 billion years ald, billion, The, Life oppeared araund, years ago, 4, This theory attempts to explain, the arigin of universe, single tuge explosion unimaginable in physical, universe expanded and the temperature, 米, The Big Bang Theory-, It talks of, terms, The, came, dawn., were formed afterwards ., ->, Hydrogen and Heliem, The condensed under gr anitation and formed, gases, the galanies of the universe., 米, Conditions om early earth - Earth is about 4.5 billion, ald . There, was n0, years, on early earth., atmaspheree, Water vapaue, 2 CO2, methane amd ammonia, eeleased, from, malten, covered the surface., mass, broke up water unto, The UV rays from the Silen, tydrogen and oxygen ., Oxygen combined with ammonia and methane to, ->, Page No. ol, Scanned with CamScanner