1.

Human organism is an internal combustion machine because ofa) assimillation of energy from food b) liberate CO2 during respirationc) expel waste food at the end state digestion d) secrete powerful digestive juices

Answer»

Hey mate.
Here is your answer-

a)ASSIMILATION of ENERGY from food.

Because combustion MEANS burning of SOMETHING. In assimilation it is also same.Food it burned by O2 to change food in glucose,energy and protein.

Hope it HELPS!!!!!!



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