Q1 of 45 Page 177

What is common between respiration and transpiration process in plants?

Both in respiration and transpiration stomata are active. The only difference is that in respiration stomata helps in exchange of gases, while in transpiration, it helps in evaporation of water.


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4

Name the respiratory pigment present in human beings. Which major air pollutant has high affinity for this pigment?

 5

(i) Name the substance which is oxidised in body during respiration.

(ii) Why lungs are divided into very small sac-like structures?

 2

Write the events that occur during the process of breathing in humans.

 3

What will happen if a human being starts taking air with mouth instead of nose?