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Topic Plant physiology
Asked 6 times across 4 UPSC exams over 40 years (1984–2024), peaking in 2024.
Key insights
- Most tested in CDS — 3 of 6 PYQs
- Most asked in 2024
- Recurs across 5 years (1984–2024)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CSE 1984 → CAPF 2019 → GEO 2021 → CDS 2023
How the concept evolved
Rising — more than half its appearances (5 of 6) 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.
CDS2024
Xylem in the plants are responsible for the transport of :
- A Water
- B Water and dissolved minerals ✓
- C Gases
- D Food
✓ Correct answer: (B)
Science & Technology › Biology & Health
CDS2024
Which one among the following hormones inhibits the growth activity in plants ?
- A Auxins
- B Cytokinins
- C Abscisic acid ✓
- D Gibberellins
✓ Correct answer: (C)
Science & Technology › Biology & Health
CDS2023
Water goes up through xylem vessels in tall trees. The process in plants and properties of water that help in upward movement are :
- A Respiration and cohesion
- B Transpiration pull, cohesion and adhesion ✓
- C Root pressure, cohesion and adhesion
- D Transpiration and adhesion
✓ Correct answer: (B)
Science & Technology › Biology & Health
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