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Topic Competitive exclusion
Asked 2 times in GEO over 1 years (2025–2026), peaking in 2025.
Key insights
- Most tested in GEO — 2 of 2 PYQs
- Most asked in 2025
- Recurs across 2 years (2025–2026)
Across exams
GEO · 2How the concept evolved
Rising — more than half its appearances (2 of 2) are since 2016.
Related concepts
Ideas UPSC tests alongside this one — keep exploring.
Sample questions
You've seen the pattern — here are a few of the actual PYQs.
GEO2026
Two species that possess the same ecological niche cannot coexist indefinitely. This is known as the
- competitive exclusion principle
- Gause's principle of competitive exclusion
- principle of character displacement
- principle of self-assembly
Which of the above is/are correct?
- A I and II
- B II and III
- C III and IV
- D I only
Answer key not yet available (pending official release)
Environment & Ecology › Ecology & Ecosystems
GEO2025
When Paramecium caudatum and Paramecium aurelia are cultured together under ideal laboratory conditions, the population of Paramecium caudatum may gradually be completely disappeared. Which one of the following laws or principles correctly explains it?
- A Niche expansion
- B Niche replacement
- C Competitive exclusion principle ✓
- D Adaptive radiation
✓ Correct answer: (C)
Environment & Ecology › Ecology & Ecosystems
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