Which Of The Following Produces Harmful Gases_________?
Correct answer: B. Motor Vehicles
- A. Plants
- B. Motor Vehicles
- C. Bacteria
- D. None of these
Explanation
Motor vehicles produce harmful gases such as carbon monoxide, nitrogen oxides and unburned hydrocarbons through fuel combustion, contributing to air pollution and respiratory disease. Students may choose plants because plants respire and release carbon dioxide, but normal plant respiration is not the main source of the harmful urban gases meant here.
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About Human Respiratory System
The human respiratory system conducts air to the alveoli, where oxygen and carbon dioxide exchange occurs across thin respiratory surfaces. Questions cover the nasal passage, trachea, bronchi, lungs, diaphragm and intercostal muscles, ventilation mechanics and gas transport, while distinguishing breathing and gaseous exchange from cellular respiration.
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