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Why can it be risky to decide evolutionary relationship only by external appearance?

Answer and explanation

Correct answer: Because similar functions can produce external similarity even when basic structures differ

External appearance can be misleading because unrelated organisms may face similar environmental demands and evolve similar shapes or functions. These are analogous similarities and do not necessarily indicate close ancestry. For example, wings of birds and insects both support flight but have different structural plans. Evolutionary relationships should therefore be assessed with internal anatomy, fossils, embryology and molecular evidence as well. Option A is correct; the other choices make absolute or false claims.

Related tags

Evolutionary EvidenceAnalogous OrgansStructure And FunctionHeredity And EvolutionWorld Of LivingScienceClass 10 Mcq

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