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What are two characteristics that mark civilisation, the final historical change that began around 5,000 years ago?
Sensatory Receptors
Specialized cells or nerve endings that respond to changes in the environment by generating electrical signals.
Sensory Adaptation
The process by which sensory receptors become less sensitive over time when they are exposed to constant stimuli.
Wavelengths
The distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.
Frequencies
The frequency with which an event happens or is replicated within a specific time frame or sample.
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