Class 7 Respiration In Organisms CBSE Questions & Answers

Class 7 · Respiration In Organisms

This is Science Class 7 Respiration in Organisms CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
An organism that respire by tracheal system is
  • A
    Cockroach
    Correct
  • B
    Earthworm
  • C
    Butterfly
  • D
    Mosquito
2
Root of plant respire by
  • A
    Root hair
    Correct
  • B
    Lenticels
  • C
    Stomata
  • D
    Spiracles
3
Gills are respiratory organs in
  • A
    Fish
    Correct
  • B
    Earthworm
  • C
    Amoeba
  • D
    Cockroach
4
Birds have _____________ for respiration.
  • A
    Lungs
    Correct
  • B
    Air bladder
  • C
    Skin
  • D
    Gills
5
Plants intake _______________ gas during respiration.
  • A
    Nitrogen
  • B
    Water vapour
  • C
    Oxygen
  • D
    Carbon dioxide
    Correct
6
During respiration
  • A
    Water is released
  • B
    Energy is released
    Correct
  • C
    Food is digested
  • D
    Energy is absorbed
7
Respiration is
  • A
    Addition reaction
  • B
    Reduction reaction
  • C
    Endothermic reaction
  • D
    Oxidation reaction
    Correct
8
Concentration of oxygen _______________ with increase in altitude.
  • A
    Remain same
  • B
    Increase
  • C
    Decrease
    Correct
  • D
    Increase or decrease
9
The process of breakdown of food in cell with release of energy is called
  • A
    Breathing
  • B
    Physical respiration
  • C
    Muscular respiration
  • D
    Cellular respiration
    Correct
10
Smallest structural and functional unit of all living organisms is called
  • A
    Cell
    Correct
  • B
    Tissue
  • C
    Muscles
  • D
    Organs
11
Food has stored energy that is released during
  • A
    Development
  • B
    Growth
  • C
    Respiration
    Correct
  • D
    Nutrition
12
We breath out air which is rich in
  • A
    Oxygen
  • B
    Hydrogen
  • C
    Nitrogen
  • D
    Carbon dioxide
    Correct
13
Cellular respiration takes place in the
  • A
    Cells of all organism
    Correct
  • B
    Tissues of all organism
  • C
    Lungs of all organisms
  • D
    Hearts of all organism
14
During aerobic respiration, glucose is broken down into ____________ using oxygen.
  • A
    Carbon dioxide and hydrogen
  • B
    Oxygen and water
  • C
    Carbon dioxide and water
    Correct
  • D
    Nitrogen and water
15
Breaking down of food without using oxygen is called
  • A
    Dehydration
  • B
    Aerobic respiration
  • C
    Anaerobic respiration
    Correct
  • D
    Decomposition