Why Is the Runoff from Fertilized Agricultural Fields, Even If

question 35

Multiple Choice

Why is the runoff from fertilized agricultural fields, even if free of pesticides, often harmful to the ecosystems of temperate lakes?

• A)Fertilizer compounds are toxic to fish.
• B)The runoff causes heavy growth of algae, which eventually die and decompose, causing oxygen depletion.
• C)Runoff water pools at the lake's bottom, where the fertilizer compounds react with materials in the sediment to form toxic substances.
• D)The runoff is acid, and acidification kills key lake organisms.

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Definitions:

Confidence Level

Confidence level refers to a statistical measure expressed as a percentage that represents the frequency at which an estimated parameter would fall within a specified range in repeated sampling.

Breaking Strength

The amount of tension force a material can withstand without rupture, often measured to determine material durability and performance under stress.

Confidence Interval

A range of values derived from sample data that is likely to contain the true value of an unknown population parameter, at a given probability level.

Confidence Level

The probability, expressed as a percentage, that a confidence interval contains the true population parameter.