Which one of the following aspects is an exclusive characteristic of living things?
Perception of events happening in the environment and their memory
Increase in mass by accumulation of material both on surface as well as internally
Isolated metabolic reactions occur in vitro
Increase in mass from inside only
The perception of events happening in the environment and their memory is the most exclusive characteristic of living being. This phenomenon is called as consciousness or irritability. Increase in mass could be seen in nonliving things as well such as in the crystal. Thus, the correct answer is option C.