Q1. [1] § 5.2.1 Autotrophic Nutrition § 5.5 EXCRETION
Observe the following diagram and identify the process and its significance from the following options :
- (a) Evaporation : maintains water contents in leaf cells.
- (b) Transpiration : creates a suction force which pulls water inside the plant.
- (c) Excretion : helps in excreting out waste water from the plant.
- (d) Translocation : helps in transporting materials from one cell to another.
Previously asked in CBSE board exam
2023 31/4/1 Q8
Generated by claude-sonnet-4-6 · 2026-06-15 06:43 · grounding rag
Model Answer
(b) Transpiration : creates a suction force which pulls water inside the plant.
Explanation
The diagram shows water vapour escaping from leaves through stomata — this is transpiration. Its key significance is that it creates a suction (transpiration pull) that draws water upward from roots through xylem. Options (a), (c), and (d) are incorrect as evaporation is a physical process, excretion refers to waste removal, and translocation involves transport of food, not water vapour loss.
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