Objections/Drawbacks/Demerits of Darwin’s theory of natural selection:
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It could explain the survival of the fittest but failed to explain the arrival of the fittest.
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It did not explain the origin of variations.
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It failed to explain inheritance of variations.
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It could not explain the continuous inheritance of vestigial organs. Eg. Appendix in man
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Could not distinguish between inheritable and non-heritable variations.