MEDICINE MCQ
INFECTIOUS DISEASES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Animals living close to people
|
|
|
Lack of a water source (desert conditions)
|
|
|
Wells that are not dug deep enough
|
|
|
Aqueducts were not built high enough
|
Detailed explanation-1: -Harmful germs and chemicals can get in the water from many sources, including: Fertilizers, pesticides, or other chemicals that have been applied to land near the water. Concentrated feeding operations (large industrial animal farms) Manufacturing operations.
Detailed explanation-2: -In the ancient world, most people relied on wells, rivers, lakes, and streams as a source of water. As ancient cities grew, they required large amounts of clean water for their citizens. However, rivers and lakes were also sometimes used as places to dispose of wastewater, sewage, and trash.
Detailed explanation-3: -Ninety-eight percent of Earth’s available fresh water is groundwater. It is about 60 times as plentiful as the fresh water found in lakes and streams.
Detailed explanation-4: -In ancient times, some people harvested rain in big containers, but many more people used water that had collected naturally in streams, rivers, and in the ground. They could find groundwater rushing by in rivers, or bubbling up from underground through a spring. They could also dig deep into the earth to find water.