Multiple Choice
Which of the following does NOT indicate microbe involvement in energy and nutrient flow?
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1. Introduction to Microbiology
Importance of Microorganisms
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Which of the following is a consequence of water polluted by human sewage?
A
Decreased microbial activity in the water
B
Improved biodiversity of aquatic life
C
Increased risk of waterborne diseases such as cholera
D
Enhanced oxygen levels in the water
Verified step by step guidance1
Understand that human sewage introduces a large number of microorganisms, including pathogens, into water bodies.
Recognize that these pathogens can cause waterborne diseases such as cholera, dysentery, and typhoid when humans consume or come into contact with contaminated water.
Consider the effect of sewage on oxygen levels: organic matter in sewage increases microbial activity that consumes oxygen, leading to decreased oxygen levels (not enhanced oxygen levels).
Note that decreased oxygen levels can harm aquatic life, reducing biodiversity rather than improving it.
Conclude that the primary consequence of water polluted by human sewage is an increased risk of waterborne diseases, making this the correct answer.
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