Q. 4 D3.9( 93 Votes )
Evolution is the gradual change taking place all the in living organisms over a very long period of time. The gradual change is a very slow-going process. The changes in specific characters of living organisms for several generations form new species. The nature selects the new species. Besides, the changes occur in stars and planets in space and in biosphere on earth is also taken into the account for evolution.
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