Which of the Following Statements About Natural Waters Is Untrue

question 133

Multiple Choice

Which of the following statements about natural waters is untrue?

• A)The microorganisms in fresh water are harmful.
• B)Microorganisms help replenish the nutrients in the water.
• C)Aerobic bacteria only decompose organic matter in the presence of oxygen.
• D)all of the above
• E)only a and b

---

Definitions:

Biodegradable

Capable of being decomposed by bacteria or other living organisms, thus avoiding pollution.

Odourless

Lacking a detectable smell, characteristic of certain substances or conditions where no odor is perceptible.

Corrosive

Materials or substances that have the ability to destroy or damage other materials through a chemical reaction.

Ozone Layer

A stratospheric layer containing a high concentration of ozone, which protects the Earth from the sun's harmful ultraviolet radiation.