Which gas is produced during the respiration of living organisms?

Living organisms, including plants and animals, undergo a process called respiration, which is essential for converting food into energy. During this process, glucose (a type of sugar) is broken down in the presence of oxygen to produce energy, water, and carbon dioxide as by-products.

Carbon dioxide is specifically produced when glucose is oxidized during cellular respiration. This gas is then typically released into the environment through exhaling in animals or diffusion in plants. Understanding the role of carbon dioxide in respiration highlights its importance in energy production for living organisms.

On the other hand, oxygen is actually consumed during respiration, not produced. Nitrogen is a major component of the atmosphere but does not play a direct role in respiration; rather, it's mainly used by plants for growth. Hydrogen does not typically get produced as a standalone product in respiration processes either. Thus, carbon dioxide is the correct response, as it accurately represents the gas produced during respiration.