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If organs of two species are similar, why does this not always prove a close relationship?

Answer and explanation

Correct answer: Because similarity may also be due to similar function in analogous organs

The governing distinction is between homologous and analogous organs. Homologous organs have a similar basic structural plan because of common ancestry, even if their functions differ. Analogous organs may perform similar functions but have different structural origins, as in the wings of birds and insects; their similarity reflects adaptation to a similar function, not necessarily close ancestry. Thus A is correct. B, C, and D wrongly reject the value of comparative anatomy or evolutionary history.

Related tags

Homologous OrgansAnalogous OrgansEvolution EvidenceHeredity And EvolutionWorld Of LivingScienceClass 10 Mcq

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