Question:
Which structure in a leaf is mainly responsible for gaseous exchange?
Which structure in a leaf is mainly responsible for gaseous exchange?
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Stomata = Gaseous exchange + Transpiration
Xylem = Water transport
Phloem = Food transport
Cuticle = Protection + Waterproofing
Xylem = Water transport
Phloem = Food transport
Cuticle = Protection + Waterproofing
Updated On: Feb 25, 2026
- Xylem
- Stomata
- Phloem
- Cuticle
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The Correct Option is B
Solution and Explanation
Step 1: Understand the function of each structure.
Step 2: Identify the structure for gaseous exchange.
Stomata are the specialized structures that open and close to regulate the exchange of gases (CO₂ and O₂) between the leaf and the atmosphere. Final Answer: (B) Stomata
- Xylem: Vascular tissue responsible for transport of water and minerals from roots to other parts of the plant.
- Stomata: Tiny pores present on the surface of leaves that allow gaseous exchange (oxygen and carbon dioxide) and transpiration.
- Phloem: Vascular tissue responsible for transport of food (sugars) from leaves to other parts of the plant.
- Cuticle: Waxy layer on the leaf surface that prevents water loss but also limits gaseous exchange.
Step 2: Identify the structure for gaseous exchange.
Stomata are the specialized structures that open and close to regulate the exchange of gases (CO₂ and O₂) between the leaf and the atmosphere. Final Answer: (B) Stomata
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