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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
it up for respiration? In plants, O 2 released during photosynthesis in day time is made available for respiration. However, the rate of photosynthesis is higher than that of respiratin. Thus, plants give out excess O 2 in the daytime. However, these release only CO 2 at night as photosynthesis stops in the absence of sunlight. Animals give out CO 2