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NEET 2023 Phase 2 · BiologyRivet-popper hypothesisPrevious Year Question

In 'rivet popper hypothesis', Paul Ehrlich compared the rivets in an airplane to

Answer: (C) Species within a genus. Answer: (3) Species within a genus Solution: In Paul Ehrlich's 'rivet popper hypothesis', the airplane represents the ecosystem and the thousands of rivets holding it together represent the species; popping a rivet is analogous to driving a species to extinction.

  1. A.Ecosystem
  2. B.Genera within a family
  3. C.Species within a genus✓
  4. D.Genetic diversity

Correct Answer

(C) Species within a genus

Solution & Explanation

Answer: (3) Species within a genus Solution: In Paul Ehrlich's 'rivet popper hypothesis', the airplane represents the ecosystem and the thousands of rivets holding it together represent the species; popping a rivet is analogous to driving a species to extinction. Thus the rivets stand for individual species (option 3, phrased here as 'species within a genus' to match the keyed answer), so 'ecosystem' (1) is the plane itself, while 'genera within a family' (2) and 'genetic diversity' (4) are not part of the analogy. NCERT: NCERT Class XII Biology, Ch 13 Biodiversity and Conservation, p.221, lines 23-24: "In an airplane (ecosystem) all parts are joined together using thousands of rivets (species)."

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