Question

1. Select the correct option,
1. The by-products of respiration are
(a) carbon dioxide, water and energy
(b) water and oxygen
(c) sugar and oxygen
(d) oxygen and carbon dioxide
2. A process in which energy is released on oxidation of glucose is called
(a) respiration
(b) excretion
(c) digestion
(d) transpiration
3. The chief respiratory organ of human beings is the
(a) lungs
(b) skin
(c) gills
(d) spiracles
4. Alveoli are the structures present in the
(a) bronchi
(b) lungs
(c) gills
(d) bronchioles
5. Oxygen carrying blood cells are the
(a) blood platelets
(b) red blood cells
(c) white blood cells
(d) lymph​

Answer 1

Answer:

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Answer 2

Answer:

1. (a)

2. (a)

3. (a)

4. (b)

5. (b)