Class 10 Biology Chapter 10 Gaseous Exchange explains how living organisms exchange gases with their environment to maintain life. In this chapter, students learn about gaseous exchange in plants, the human respiratory system, and common respiratory disorders.
These notes include important MCQs, short questions, and long questions prepared according to the latest syllabus. PDF versions for both English and Urdu medium students are available below to help in effective exam preparation.
📚 Important MCQs – Chapter 10 Gaseous Exchange
1. Which structure is mainly responsible for gaseous exchange in leaves?
(a) Xylem
(b) Phloem
(c) Stomata ✅
(d) Lenticels
2. What happens during the night in leaf cells regarding gaseous exchange?
(a) They release oxygen and absorb carbon dioxide
(b) Photosynthesis and respiration occur together
(c) They take in oxygen and release carbon dioxide ✅
(d)Only photosynthesis occurs
3. Which part of the respiratory system is common to both food and air?
(a) Larynx
(b) Trachea
(c) Pharynx ✅
(d) Nasal cavity
4. Which symptom is common in both emphysema and lung cancer?
(a) Vomiting
(b) Shortness of breath ✅
(c) Skin rash
(d) Tooth pain
✏️ Short Questions – Chapter 10
1. Why do plants not require a respiratory system like animals?
Answer: Plants do not require a respiratory system because
each cell of the plant exchanges gases directly with the environment without the need for specialized organs.
2. How do stomata help in gaseous exchange in plants?
Answer: Stomata are small pores on the epidermis of leaves and young stems that allow oxygen and carbon dioxide to enter and exit the plant during photosynthesis and respiration.
3. What are the two main parts of the human respiratory system?
Answer: The two main parts are:
- Air passageway
- Lung
📝 Long Question – Chapter 10
Q.1: Describe the process of gaseous exchange in plants.
Answer: Plants do not have a specialized respiratory system like animals. Every plant cell exchanges gases directly with the environment. The process of gaseous exchange in plants takes place through the following ways:
- Role of Stomata
- Role of Air Spaces in Mesophyll
- Role of Lenticels
- Gaseous Exchange in Roots
- Gaseous Exchange in Aquatic Plants
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