"All organisms which obtain energy by aerobic respiration cannot live without oxygen".Comment

Dear student,

"All organisms which obtain energy by aerobic respiration cannot live without oxygen".This is because all the organisms which perform aerobic respiration require oxygen to break down the food or the glucose to obtain energy. The breakdown can only occur in the complete presence of the oxygen in the air for aerobic respiration.
For example, in humans, aerobic respiration occurs in which the glucose is broken down inside the cell in the presence of the oxygen to release the energy. The reaction for aerobic respiration is as follows:
Glucose+O2→CO2+water+large amount of energy.
Hence, all organisms which obtain energy by aerobic respiration cannot live without oxygen because this process occurs only in the presence of the oxygen.
Regards

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