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Which one of the following aspects is an exclusive characteristic of living things?

1. Isolated metabolic reactions occur in vitro
2. Increase in mass from inside only
3. Perception of events happening in the environment and their memory
4. Increase in mass by accumulation of material both on surface as well as internally.

Correct answer: Perception of events happening in the environment and their memory

Solution

Living things uniquely detect changes in their surroundings and can store/retain information about them, which supports adaptive behavior. Growth or metabolic reactions can occur in non-living contexts, so they are not exclusive to life.

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