Assertion : Unicellular organisms do not respire, only multicellular organisms respire. Reason : Unicellular organisms consists of a single cell whereas multicellular organisms are made up of many cells.
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A is false but R is true. As both unicellular and multicellular organisms respire. Cellular respiration takes place in each and every living cell. The mechanism of ‘breathing’ in unicellular organisms is different from multi-cellular organisms. Respiration is defined as a metabolic process wherein, the living cells of an organism obtains energy (in the form of ATP) by taking in oxygen and liberating carbon dioxide from the oxidation of complex organic substances.
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