Lamarckism and Darwinism: Major differences
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Lamarckism
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Darwinism
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1. Proposed by Jean de Lamarck
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Proposed by Charles Darwin
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2. Main postulates are environmental changes,
new needs, use and disuse of organs, development of acquired characters, inheritance
of acquired characters and speciation.
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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.
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3. Speciation is due to accumulation of
acquired characters of a number of previous generations.
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Speciation is due to accumulation of useful continuous variations of a number
of previous generations.
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4. Use and disuse of organs is the major
cause of development of acquired characters.
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Natural selection is the key point of speciation.
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