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NEET 2016 Phase 1 · BiologyPrevious Year Question

Gause's principle of competitive exclusion states that: (NEET 2016 (Phase 1))

Answer: (C) No two species can occupy the same niche indefinitely for the same limiting resources. Answer: (C) No two species can occupy the same niche indefinitely for the same limiting resources.

  1. A.More abundant species will exclude the less abundant species through competition
  2. B.Competition for the same resources excludes species having different food preferences
  3. C.No two species can occupy the same niche indefinitely for the same limiting resources✓
  4. D.Larger organisms exclude smaller ones through competition

Correct Answer

(C) No two species can occupy the same niche indefinitely for the same limiting resources

Solution & Explanation

Answer: (C) No two species can occupy the same niche indefinitely for the same limiting resources. Solution: Gause's Competitive Exclusion Principle states that two closely related species competing for the same limiting resources cannot co-exist indefinitely; the competitively inferior one is eventually eliminated. Option C captures this idea (same niche/same limiting resources), whereas A and D wrongly base exclusion on abundance or body size. NCERT: Ch 11, p.199, lines 30-33 — "Gause’s ‘Competitive Exclusion Principle’ states that two closely related species competing for the same resources cannot co-exist indefinitely and the competitively inferior one will be eliminated eventually."

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