what are demerits of Lamarkism

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Demerits of Lamarckism:
1. The idea of Lamarck's use and disuse of organs was discarded by Weismann by proposing theory of continuity of germplasm. 
2. There is no background of the idea that there exists a vital force in organism that increases its parts.
3. Lamarck did not considered the role of evolution while formulating his theory.
4. Lamarck also postulated that characters acquired during the lifetime can be inherited, is also dismissed by various scientist.

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