What is the process in which organisms take in oxygen and use it to break down food for cellular activities called?
Respiration
Living organisms need a continuous supply of energy to carry out cellular activities such as growth, movement, and repair.
Respiration is the biological process in which organisms take in oxygen and use it to oxidise, or break down, food molecules such as glucose, releasing energy along with carbon dioxide and water as by-products.
This is different from fermentation, which is an anaerobic breakdown of food without oxygen, transpiration, which is loss of water vapour from plants, and photosynthesis, which is the process by which plants make food using sunlight.
Hence, the process in which organisms take in oxygen and use it to break down food for cellular activities is called respiration.
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