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

question 73

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 freshwater ecosystems, such as this one?

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

---

Definitions:

Fecal Occult

A medical test used to check stool samples for hidden (occult) blood, which can be an indicator of colorectal cancer or other digestive system conditions.

Rectal Examination

A medical procedure used to check for abnormalities of the rectum, anal canal, or prostate.

Soiled Materials

Objects or fabrics contaminated with potentially infectious substances such as bodily fluids, dirt, or other pollutants.

Medical Terminology

A specialized language used in the medical and healthcare fields that consists of terms which are derived from Latin and Greek words, enabling professionals to describe the human body, its components, processes, conditions affecting it, and procedures performed upon it.