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Why are the human arm and whale forelimb considered homologous?

Answer and explanation

Correct answer: Because their basic bone structure is similar

The human arm and whale forelimb perform different functions: one is adapted mainly for manipulation and the other for swimming. Nevertheless, both show a corresponding arrangement of bones, including the upper-arm bone, forearm bones and wrist and digit elements. This shared basic structural plan indicates inheritance from a common ancestor, so they are homologous organs. Option A is correct; similarity of function is not required.

Related tags

Homologous OrgansHuman ArmWhale ForelimbCorrosion And Extraction BasicsMetals And Non MetalsScienceClass 10 Mcq

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