Tuesday, March 12, 2013

Comparison between Lamarckism and Darwinism

Lamarckism and Darwinism: Major differences

Lamarckism
Darwinism
1.      Proposed by Jean de Lamarck
Proposed by Charles Darwin
2.      Main postulates are environmental changes, new needs, use and disuse of organs, development of acquired characters, inheritance of acquired characters and speciation.
Main postulates are overpopulation, limited resources (food etc), struggle for existence, development of variations, natural selection of the fittest, inheritance of useful continuous variations and speciation.
3.      Speciation is due to accumulation of acquired characters of a number of previous generations.
Speciation is due to accumulation of useful continuous variations of a number of previous generations.
4.      Use and disuse of organs is the major cause of development of acquired characters.
Natural selection is the key point of speciation.

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