The directed movement of microorganisms toward or away from air or oxygen.
From Greek aero- (air) and taxis (arrangement, order, movement). This biological term became standard in microbiology during the 20th century as scientists studied bacterial behavior.
Through aerotaxis, bacteria can sense oxygen levels and move accordingly—it's one of the simplest forms of 'decision-making' in nature, where a single-celled organism navigates its chemical environment.
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