Which of the Following Statements Best Describes the Impact of Human

question 43

Multiple Choice

Which of the following statements best describes the impact of human activities on the cycling of nutrients in natural systems?

• A)Human activities are essentially benign and have little lasting impact on either atmospheric or sedimentary nutrient cycling.
• B)Human activities have profoundly impacted nutrient cycling, particularly with those nutrients that cycle within the atmosphere.
• C)Human activities like mining, construction, and road building disrupt the Earth's surface and greatly increase those nutrients with sedimentary cycling pathways.
• D)Human activities in general significantly enhance nutrient availability and are almost always associated with ecosystem improvements.

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Definitions:

Colon And Rectum

Parts of the large intestine; the colon absorbs water and nutrients from digested food, and the rectum stores feces until excretion.

Diagnosed

Determination of a disease or condition from its signs and symptoms.

Double-Contrast Study

A radiographic technique used in medical imaging that uses two types of contrast material to better visualize the interior lining of organs.

Barium Enema

A diagnostic medical imaging procedure used to examine the interior of the colon by filling it with a barium sulfate contrast material.