Water Pollution in Less-Developed Countries

question 101

Multiple Choice

Water pollution in less-developed countries

• A) is mainly caused by untreated sewage.
• B) occurs less frequently than in more-developed countries.
• C) does not include industrial wastes.
• D) does not include agricultural runoff.
• E) is characterized by all of these answers.

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Definitions:

Urea

A waste product formed in the liver from the breakdown of proteins and excreted in the urine, used as a measure of kidney function.

Filtrate

The liquid that has passed through a filter, separating it from the suspended solids during the process of filtration.

Loop Of Nephron

A U-shaped structure in the nephron of the kidney that plays a critical role in concentrating urine and recovering water and salt from the filtrate.

Viscous

A physical property describing a fluid that is thick and sticky, offering resistance to flow, such as honey or glycerin.