Which of the following is not a vestigial organ of man?
Correct answer: D. None of these
- A. Appendix
- B. Coccyx
- C. Both Options A and B are correct
- D. None of these
Explanation
Vestigial structures are anatomical remnants that were important in the organism's ancestors but are no longer needed in the same capacity. In humans, the appendix and coccyx are typically considered vestigial. The appendix may have once helped in digestion, while the coccyx is the remnant of a tail. Therefore, 'None of these' is the correct answer because both the appendix and coccyx are vestigial organs. Options A, B, and C incorrectly suggest that one or both of these organs are not vestigial.
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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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