An example of a homologous organ is represented best by:
Correct answer: C. The arm of a human, wing of a bird
- A. Wing of an insect, wing of a bird
- B. Leg of a dog, leg of a spider
- C. The arm of a human, wing of a bird
- D. All of these
Explanation
Homologous organs are organs that share a common evolutionary origin but have evolved to perform different functions. The arm of a human and the wing of a bird are both derived from the same forelimb structure in their common ancestor. However, over time, the forelimbs of humans and birds have evolved to perform different functions: the human arm is used for grasping and manipulation, while the bird wing is used for flight.
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About Evolution
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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