What's the difference between homologous and analogous structures?
Correct answer: D. Homologous structures result from a common ancestor; analogous structures result from a convergent evolution
- A. Homologous structures result from a common ancestor; analogous structures result from repetitive usage by the individual
- B. Homologous structures result from convergent evolution; analogous structures result from a common ancestor
- C. There is no difference between homologous and analogous structures
- D. Homologous structures result from a common ancestor; analogous structures result from a convergent evolution
Explanation
Homologous organs are those which have a ancestor in common but diverge to perform different functions and thus, representing divergent evolution. On the other hand, Analogous organs are all those which arise from different ancestors but evolve to perform the same function, representing convergent evolution. According to the above explanation, option 'D' represents the correct difference.
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Evolution describes heritable change in populations over generations through variation, natural selection and adaptation. Lamarckism explains inheritance of acquired characteristics, while Darwinism explains selection of favourable inherited variations; these historical explanations must not be confused with the modern genetic account of evolutionary change.
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