Respuesta :
Ans. (C).continuously.
Cellular respiration can be defined as a metabolic process, which involves breakdown of carbohydrate molecules to produce energy in the form of ATP molecules. These ATP molecules release energy during chemical hydrolysis.
Cells present in body require a continuous supply of energy to preform all of metabolic reactions. Hence, cells perform cellular respiration continuously or constantly.
Thus, the correct answer is option (C).