Sample questions
GEO2025
Which one of the following is the main driver in explaining the cohesion-tension-transpiration pull model of water transport in plants?
- A Evapotranspiration
- B Transpiration ✓
- C Cohesion process
- D Surface tension
✓ Correct answer: (B)
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
NDA2021
In a dicot pot herb, vaseline/vegetable oil was applied on the upper surface of one leaf (Experimental leaf 1) and on the lower surface of another leaf (Experimental leaf 2). Vaseline/Vegetable oil was not applied on the control leaf. The plant was deliberately not watered for several days. Which leaf will dry up last ?
- A Experimental leaf 1
- B Experimental leaf 2 ✓
- C Control leaf
- D All the leaves will dry up simultaneously
✓ Correct answer: (B)
Science & Technology › Biology & Health
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