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How does antibiotic resistance illustrate evolution happening on an observable human timescale?

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1. How does antibiotic resistance illustrate evolution happening on an observable human timescale?

Bacteria that survive a course of antibiotics, often due to random genetic variation, reproduce and pass on that resistance, and misuse can accelerate this process

Antibiotic resistance has no connection to evolutionary processes of any kind

Bacteria can never develop resistance to antibiotics under any circumstances

Evolutionary processes only occur over millions of years, never within a human lifetime

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How does antibiotic resistance illustrate evolution happening on an observable human timescale?

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