Plants use the process of photosynthesis to convert carbon dioxide gas from the atmosphere into organic compounds, such as glucose, and give out oxygen as a byproduct.

Respiration is a process that occurs in all living organisms, including plants. During respiration, oxygen is used to break down organic compounds into simpler molecules, releasing carbon dioxide and water as byproducts.

Photosynthesis and respiration are essential processes for the survival of plants. Photosynthesis provides plants with the energy they need to grow, while respiration provides plants with the oxygen they need to survive.