Chapter 3 Physiological Processes Of Life Respiration Multiple Choice Questions
Question 1. Which feature is essential for a respiratory organ?
- It must have wide surface area
- It must be wet
- It must be well vascularise
- All of these
Answer: 4. All of these
Question 2. The respiratory organ of herbs are—
- Stomata
- Stomata and lenticels
- Stomata and cuticle
- Cuticle
Answer: 3. Stomata and lenticels
WBBSE Class 9 Life Science Solutions
Question 3. Halophytes respire with—
- Stomata
- Stomata and cuticle
- Stomata and pneumatophores
- Pneumatophores and cuticle
Answer: 3. Stomata and pneumatophores
Read and Learn More WBBSE Class 9 Life Science MCQs
Question 4. Pneumatophores collect air trom the—
- Atmosphere
- Mud
- Saline water
- Moist soil
Answer: 1. Atmosphere
Question 5. The most efficient organs for respiration in plants are—
- Stomata
- Lenticels
- Pneumatophores
- Cuticular pores
Answer: 1. Stomata
Question 6. The respiratory organ of starfish is
- Tube feet
- Lungs
- Book lung
- Gills
Answer: 1. Tube feet
WBBSE Class 9 Respiration MCQs
Question 7. The most efficient organ for aerial respiration in animals is—
- Skin
- Lungs
- Book lungs
- Trachea
Answer: 2. Lungs
WBBSE Class 9 Life Science Question And Answer
Question 8. The Trachea of insects supply oxygen to—
- Haemolymph
- Body fluid
- Intercellular fluid
- Cells
Answer: 3. Intercellular fluid
Question 9. Spiracles of cockroaches are present on—
- Tergite
- Sternite
- Pleurite
- Pronotum
Answer: 3. Pleurite
Question 10. Air enters the tracheal network of insects by—
- Stomata
- Tracheoles
- Pleurites
- Spiracles
Answer: 4. Spiracles
Question 11. Blood plays no role in carrying respiratory gases in—
- Fishes
- Earthworms
- Cockroaches
- Molluscs
Answer: 3. Cockroaches
Question 12. The copper-containing pigment which carries oxygen during respiration, is
- Haemoerythrin
- Haemocyanin
- Haemoglobin
- Chlorocruonin
Answer: 2. Haemocyanin
Practice MCQs for Chapter 3 Respiration
Question 13. Haemocyanin pigment is found in
- Prawn and cockroach
- Prawn and snail
- Snail and earthworm
- Cockroach and snail
Answer: 2. Prawn and snail
Question 14. Gills collect oxygen from water by—
- Diffusion
- Endosmosis
- Active transport
- Facilitated diffusion
Answer: 1. Diffusion
Question 15. In which fish, accessory respiratory organs are found?
- Rohu
- Prawn
- Shark
- Magur
Answer: 4. Magur
Question 16. The elongated respiratory tube acts as an accessory respiratory organ in—
- Koi fish
- Magur fish
- Singhifish
- Sholfish
Answer: 3. Singhifish
Question 17. Other than fishes, gills are seen in—
- Aquatic insects
- Spiders
- Tadpoles
- All of these
Answer: 3. Tadpoles
Important Questions on Respiratory Processes for Class 9
Question 18. Pigeons have air sacs.
- 8
- 8 pairs
- 9
- 10 pairs
Answer: 3. 9
WBBSE Class 9 Life Science Question And Answer
Question 19. Pleural fluid is present in between the—
- Lung and visceral pleura
- Lung and parietal pleura
- Visceral and parietal pleura
- Alveoli
Answer: 3. Visceral and parietal pleura
Question 20. Total alveoli in two lungs of a healthy and normal human being range from—
- 10-20 crores
- 20-25 crores
- 30-50 crores
- 70-80 crores
Answer: 3. 30-50 crores
Question 21. Which statement is correct?
- In a normal human being, both lungs are of the same volume.
- In humans, the right lung is smaller.
- In humans, the left lung is smaller with three lobes.
- In humans, the right lung is larger with three lobes.
Answer: 4. In humans, the right lung is larger with three lobes.
Question 22. In the lungs,______takes part in the gaseous exchange.
- Bronchus
- Bronchiole
- Alveolus
- Trachea
Answer: 3. Alveolus
Concepts Related to Respiration for MCQs
Question 23. The carcinogenic compound, that enters into the lungs during cigarette smoking, is—
- CO2
- CO
- HCN
- Benzoapyrene
Answer: 4. Benzoapyrene
Question 24. An adult human being can normally breathe times in one minute.
- 100
- 10
- 14-18
- 20-25
Answer: 3. 14-18
Question 25. Which of the following is a respiratory muscle?
- Biceps
- Triceps
- External intercostal muscle
- Myocardium
Answer: 3. External intercostal muscle
Sample MCQs from WBBSE Class 9 Life Science Chapter 3
Question 26. The ribcage of a human is made up of pairs of bones.
- 14
- 12
- 13
- 16
Answer: 2. 12