The gas in the atmosphere that is essential for respiration is oxygen (O₂).
Explanation:
- Oxygen is required by living organisms to carry out cellular respiration, a process in which energy is produced from food.
- During respiration, oxygen is inhaled and transported to cells, where it helps break down glucose to release energy.
Process Involved:
- Oxygen reacts with glucose in cells
- Energy (ATP) is released
- Carbon dioxide (CO₂) and water (H₂O) are produced as byproducts
Importance of Oxygen:
- Supports life processes in humans and animals
- Helps in energy production
- Essential for the survival of most living organisms
Conclusion:
Oxygen is a vital atmospheric gas required for respiration, enabling organisms to produce the energy needed for survival.