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Describe the contribution of Lamarck.

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The gradual unfolding of organisms from pre- existing organisms through changes since the beginning of life is called evolution.The theory proposed byJ.B. Lamarck is known as the theory of inheritance of acquired characters. According to this theory, the use and disuse of an organ leads to acquiring of change in that organ. These changes or variations can be passed on from one generation to the next but this idea of inheritance of acquired characters was soon discarded.

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