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Respiration in Plants BIOLOGY 263 Notes MODULE - 2 Forms and Functions of 12.1 RESPIRATION Plants and animals Respiration is the stepwise oxidation of complex organic molecules and release of energy as ATP for various cellular metabolic activities. It involves exchange of gases between the organism and the external environment. The green as well as non-green
Carbon dioxide is also released when organisms breathe. Respiration also takes place at the cellular level. All plants and animals return both carbon dioxide and water vapor to the atmosphere. Every cell needs to respire to produce the energy it needs.This process is known as cellular respiration. The process of respiration produces energy for organisms by combining glucose with oxygen from the air. During cellular respiration, glucose and oxygen are changed into energy and carbon dioxide.Therefore, carbon dioxide is released into the atmosphere during the process of cellular respiration.he process of respiration produces energy for organisms by combining glucose with oxygen from the air. During cellular respiration, glucose and oxygen are changed into energy and carbon dioxide. Therefore, carbon dioxide is released into the atmosphere during the process of cellular respiration.