WBBSE Class 9 Life Science MCQ Questions Chapter 3.2A Respiration: Organ-Level Respiration

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Well structured WBBSE Class 9 Life Science MCQ Questions Chapter 3.2A Respiration: Organ-Level Respiration can serve as a valuable review tool before exams.

Respiration: Organ-Level Respiration Class 9 WBBSE MCQ Questions

Multiple Choice Questions :

Question 1.
Which feature is essential for a respiratory organ?
(A) It must have wide surface area
(B) It must be wet
(C) It must be well vascularised
(D) All of these
Answer:
(D) All of these

Question 2.
Respiratory organ of starfish is
(A) Tube feet
(B) Lungs
(C) Book lung
(D) Gills
Answer:
(A) Tube feet

Question 3.
The respiratory organ of herbs are-
(A) Stomata
(B) Stomata and lenticels
(C) Stomata and cuticle
(D) Cuticle
Answer:
(C) Stomata and cuticle

WBBSE Class 9 Life Science MCQ Questions Chapter 3.2A Respiration: Organ-Level Respiration

Question 4.
Halophytes respire with-
(A) Stomata
(B) Stomata and cuticle
(C) Stomata and pneumatophores
(D) Pneumatophores and cuticle
Answer:
(C) Stomata and pneumatophores

Question 5.
Pneumatophores collect air from the-
(A) Atmosphere
(B) Mud
(C) Saline water
(D) Moist soil
Answer:
(A) Atmosphere

Question 6.
The most efficient organ for aerial respiration in animals is-
(A) Skin
(B) Lungs
(C) Book lungs
(D) Trachea
Answer:
(B) Lungs

Question 7.
Blood plays no role in carrying respiratory gases in-
(A) Fishes
(B) Earthworms
(C) Cockroaches
(D) Molluscs
Answer:
(C) Cockroaches

WBBSE Class 9 Life Science MCQ Questions Chapter 3.2A Respiration: Organ-Level Respiration

Question 8.
Gills collect oxygen from water by-
(A) Diffusion
(B) Endosmosis
(C) Active transport
(D) Facilitated diffusion
Answer:
(A) Diffusion

Question 9.
Trachea of insects supply oxygen to-
(A) Haemolymph
(B) Body fluid
(C) Intercellular fluid
(D) Cells
Answer:
(C) Intercellular fluid

Question 10.
Other than fishes, gills are seen in-
(A) Aquatic insects
(B) Spiders
(C) Tadpoles
(D) All of these
Answer:
(C) Tadpoles

Question 11.
Air enters in the tracheal network of insects by-
(A) Stomata
(B) Tracheoles
(C) Plurites
(D) Spiracles
Answer:
(D) Spiracles

Question 12.
Elongated respiratory tube acts as an accessory respiratory organ in-
(A) Koi fish
(B) Magur fish
(C) Singhi fish
(D) Shol fish
Answer:
(C) Singhi fish

WBBSE Class 9 Life Science MCQ Questions Chapter 3.2A Respiration: Organ-Level Respiration

Question 13.
Pleural fluid is present in between the-
(A) Lung and visceral pleura
(B) Lung and parietal pleura
(C) Visceral and parietal pleura
(D) Alveoli
Answer:
(C) Visceral and parietal pleura

Question 14.
Total alveoli in two lungs of a healthy and normal human being ranges from-
(A) 10-20 crores
(B) 20-25 crores
(C) 30-50 crores
(D) 70-80 crores
Answer:
(C) 30-50 crores

Question 15.
Which statement is correct?
(A) In a normal human being, both lungs are of same volume.
(B) In human, right lung is smaller.
(C) In human, left lung is smaller with three lobes.
(D) In human, right lung is larger with three lobes.
Answer:
(D) In human, right lung is larger with three lobes.

Question 16.
In lungs, _____ takes part in the gaseous exchange.
(A) Bronchus
(B) Bronchiole
(C) Alveolus
(D) Trachea
Answer:
(C) Alveolus

Question 17.
The carcinogenic compound, that enters into the lungs during cigarette smoking, is-
(A) CO2
(B) CO
(C) HCN
(D) Benzopyrine
Answer:
(D) Benzopyrine

WBBSE Class 9 Life Science MCQ Questions Chapter 3.2A Respiration: Organ-Level Respiration

Question 18.
Spiracles of cockroach are present on-
(A) Tergite
(B) Sternite
(C) Pleurite
(D) Pronotum
Answer:
(C) Pleurite

Question 19.
In which fish, accessory respiratory organs are found?
(A) Rohu
(B) Prawn
(C) Shark
(D) Magur
Answer:
(D) Magur

Question 20.
Haemocyanin pigment is found in _____.
(A) Prawn and cockroach
(B) Prawn and snail
(C) Snail and earthworm
(D) Cockroach and snail
Answer:
(B) Prawn and snail

Question 21.
Pigeons have ____ air sacs.
(A) 8
(B) 8 pairs
(C) 9
(D) 10 pairs
Answer:
(C) 9

Question 22.
An adult human being can normally breath ______ times in one minute.
(A) 100
(B) 10
(C) 14-18
(D) 20-25
Answer:
(C) 14-18

WBBSE Class 9 Life Science MCQ Questions Chapter 3.2A Respiration: Organ-Level Respiration

Question 23.
The copper-containing pigment which carries oxygen during respiration, is _____.
(A) Haemoerythrin
(B) Haemocyanin
(C) Haemoglobin
(D) Chlorocruonin
Answer:
(B) Haemocyanin

Question 24.
Which of the following is a respiratory muscle?
(A) Biceps
(B) Triceps
(C) External intercostal muscle
(D) Myocardium
Answer:
(C) External intercostal muscle

Question 25.
Ribcage of human is made up of _____ pairs of bones.
(A) 14
(B) 12
(C) 13
(D) 16
Answer:
(B) 12

Question 26.
The most efficient organs for respiration in plants are-
(A) Stomata
(B) Lenticels
(C) Pneumatophores
(D) Cuticular pores
Answer:
(A) Stomata

Fill in the blanks :

  1. Whales respire through _____.
  2. Respiration is a/an _____ process.
  3. Limulus respire through _____.
  4. The ____ is known as Adam’s apple.
  5. During hibernation, animals respire through ____.
  6. Spiders respire through ____.
  7. In blood, oxygen is transported as ______.
  8. _____ is the cartilaginous covering present at the entrance of the larynx.
  9. Todpoles breath through external _____.

Answer:

  1. Lungs
  2. Anabolic
  3. Bookgills
  4. Larynx
  5. Skin
  6. Booklung
  7. Oxyhaemoglobin
  8. Epiglottis
  9. Gills

WBBSE Class 9 Life Science MCQ Questions Chapter 3.2A Respiration: Organ-Level Respiration

State true or false :

  1. A typical respiratory organ should not be moist.
  2. Pneumatophores are called ‘breathing roots’, which grow against gravity.
  3. Frogs show cutaneous respiration.
  4. Gills are covered with bony plates, called cranium.
  5. Each bronchus of lung ramifies reveral times, from finer to finest air tubules, called bronchioles.
  6. Breathing involves two phases-inspiration and expiration.
  7. During expiration diaphragm expands.
  8. Smokers develop a chronic lung disease, called emphysema.
  9. During inspiration, intercostal muscles relax to push the ribs downwards.
  10. Tuberculosis is caused by Mycobacterium tuberculosis.

Answer:

  1. False
  2. True
  3. True
  4. False
  5. True
  6. True
  7. True
  8. True
  9. False
  10. True

Match the columns :

Question 1.

Left column Right column
1. Stomata A. Halophytes
2. Lenticel B. Barks of trees
3. Pneumatophore C. Photosynthesis
4. Chloroplast D. Leaf surface
E. Food storage

Answer:

Left column Right column
1. Stomata D. Leaf surface
2. Lenticel B. Barks of trees
3. Pneumatophore A. Halophytes
4. Chloroplast C. Photosynthesis

WBBSE Class 9 Life Science MCQ Questions Chapter 3.2A Respiration: Organ-Level Respiration

Question 2.

Left column Right column
1. Skin A. Amoeba
2. Gills B. Cockroach
3. Body surface C. Toad
4. Trachea D. Fish
E. Human

Answer:

Left column Right column
1. Skin C. Toad
2. Gills D. Fish
3. Body surface A. Amoeba
4. Trachea B. Cockroach

Question 3.

Left column Right column
1. Labyrinth organ A. Clarias (Magur)
2. Respiratory tube B. Anabas (Koi)
3. Respiratory tree C. Frog
4. Spiracles D. Heteropneustes (Singhi)
E. Cockroach

Answer:

Left column Right column
1. Labyrinth organ B. Anabas (Koi)
2. Respiratory tube D. Heteropneustes (Singhi)
3. Respiratory tree A. Clarias (Magur)
4. Spiracles E. Cockroach

WBBSE Class 9 Life Science MCQ Questions Chapter 3.2A Respiration: Organ-Level Respiration

Question 4.

Left column Right column
1. Double layered membrane A. Alveoli
2. Tubular wind pipe B. Bronchioles
3. Fine air tubules C. Thylakoids
4. Balloon shaped sacs D. Trachea
E. Pleura

Answer:

Left column Right column
1. Double layered membrane E. Pleura
2. Tubular wind pipe D. Trachea
3. Fine air tubules B. Bronchioles
4. Balloon shaped sacs A. Alveoli

 

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