Examlex
When penicillin was introduced,how long did it take for penicillin-resistant strains of bacteria to emerge?
Urban Population
The segment of a country's population that resides within towns and cities as defined by governmental standards.
Population Growth
An increase in the number of people that reside in a country or region over a specific period of time.
Infrastructure
The fundamental facilities and systems serving a country, city, or area, including transportation and communication systems, water and power lines, and public institutions like schools and hospitals.
Cellular Phones
Mobile phones that operate over a cellular network, allowing for voice and data communication without a physical wired connection.
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