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Topic Natural selection
Asked 2 times across 2 UPSC exams, peaking in 2021.
Key insights
- Most tested in CDS — 1 of 2 PYQs
- Most asked in 2021
- Recurs across 1 years (2021–2021)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CDS 2021 → GEO 2021
How 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.
CDS2021
Which one of the following statements about variations is not true?
- A Variation is minimum in asexual reproduction.
- B All variations in a species have equal chances of survival. ✓
- C Changes in genetic constitution result in variation.
- D Variants can be selected by environmental factors.
✓ Correct answer: (B)
Science & Technology › Biotech & Genetics
GEO2021
Which one of the following is NOT a condition necessary for natural selection to occur?
- A More organisms are born than can survive
- B Organisms should not vary in their characteristics within a species
- C Variation is inherited
- D Differences in reproduction and survival are due to variation among organisms
Answer key not yet available (pending official release)
Science & Technology › Biology & Health
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