A 3-Hectare Lake in the American Midwest Suddenly Has Succumbed

question 41

Multiple Choice

A 3-hectare lake in the American Midwest suddenly has succumbed to an algal bloom. What is the likely cause of eutrophication in this lake?

• A) increased solar radiation
• B) introduction of non-native tertiary consumer fish
• C) nutrient-rich runoff
• D) accidental introduction of a prolific culture of algae
• E) iron dust blowing into the lake

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Definitions:

Proportion

A mathematical ratio indicating the relationship in quantity, amount, or size between parts of a whole.

Nominal

Pertaining to data that can be categorized but not ranked or ordered; involves naming or labeling attributes.

Ordinal

Pertaining to a scale or series that denotes order but not relative size or degree.

Interval

A range between two numbers or points, often used to describe the range in a set of data or the domain of a function.