PREVIOUSLY ASKED IN:
PSC Miscellaneous 2012
Answer
Oxygen
Explanation
Oxygen is essential for the respiration process of most living organisms, including humans.
Key Points
- > Essential gas: Oxygen
- > Produced by: Plants
- > Helps in energy production
Additional Information
- We get energy from food through respiration.
- Oxygen is a byproduct of the photosynthesis process in plants.
| Process | Key Gas |
|---|---|
| Respiration | Oxygen |
| Photosynthesis | Carbon Dioxide |